The head on you" is used mostly as a greeting or when you have nothing else to say.
"The price of turnips" is a suggestion that what is being talked about is irrelevant or a non sequitur.
Together "The head on you and the price of turnips" means "You look rather silly."
Jack o laterns I think you mean, which are called "pumpkins" in Ireland they were used for soup, now as carvings on halloween. In recent times turnips were used for carving instead of pumpkins. Both are used for soup.
If you mean southern Ireland as a reference to the part of island of Ireland that is not Northern Ireland, then yes. The term "southern Ireland" is an incorrect and inaccurate reference to what is more commonly known as the Republic of Ireland. If you mean geographically, then the answer is no, as the most northerly point on the island of Ireland is Malin Head in county Donegal. County Donegal is in the Republic of Ireland, not Northern Ireland. See the map at the link below which shows the counties of the Republic of Ireland in green, and the counties of Northern Ireland in a tan colour. You will see that Donegal is in the Republic of Ireland, not Northern Ireland, and that it has the most northerly point on the island of Ireland.
If you mean constituencies, there are 43 in the Republic of Ireland and 18 in Northern Ireland. There are 32 counties in Ireland, if that is what you mean, 26 in the Republic of Ireland and 6 in Northern Ireland.
You may mean Northern Ireland and the Republic of Ireland. You may mean Ireland's 4 provinces. You may mean Ireland's 32 counties. See the related question below.
it means you get two for the price of one
Ireland is a country.
A republic is where power is held by the people and their elected representatives, and which has an elected or nominated president rather than a king or queen. That is the case in Ireland, as it has democratically elected representatives and has a president as the head of state. So Ireland is a republic. In order to distinguish it from Northern Ireland, it is often referred to as the Republic of Ireland, though that is not an official name.
It means "deputy" and in Ireland it refers to the Deputy head of an Irish government. The current Tánaiste (May 2013) is Eamon Gilmore.
Ireland is divided into 32 counties - including the 6 in Nothern Ireland.
I think you mean a tuber vegetable. Which are root vegetables such as, carrots, potatos, turnips, radishes, etc....
I presume you mean Southern Ireland, not Southern Island. The answer is no. Technically there is no such place as Southern Ireland. It is an incorrect term to distinguish the rest of Ireland from Northern Ireland. It is not an official name and not even geographically accurate. The most northerly point on the island of Ireland, Malin Head, is in what people refer to as "Southern Ireland". According to the Irish Constitution, the official name is Éire, or in English it is Ireland. It is also referred to as the Republic of Ireland, though that is not an official name. It is an independent country and is not part of the United Kingdom.
23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.23 counties of Ireland are not in Ulster, with 9 counties in Ulster. What you mean is which three Ulster counties are not in Northern Ireland. Donegal, Cavan and Monaghan are in Ulster, but not in Northern Ireland.