Unus pro omnibus, omnes pro uno is a Latin phrase that means "One for all, all for one" in English. It is known as being the motto of Alexandre Dumas' Three Musketeers and is also the traditional motto of Switzerland.
In 1868 officials launched an add campaign using that phrase ("Unus pro omnibus, omnes pro uno") to evoke a sense of duty due to widespread flooding in the alps and solicitations for donations as well as charity work. It is still the unofficial motto of Switzerland, and may have originated in a book / play of "The Three Musketeers" (1844). Generally the intent of the saying is to stand as a united group against all attacks upon the group, the sacrifice of one for that group being a noble thing to the group.
all by one's self
no
To make the meaning of a phrase more cryptic, one could write the phrase in a code. One could also substitute vague words for more specific words in the phrase.
Consider the phrase deeply, from all angles, all perspectives of your life.
It means that they missed you. They wished that you were there.
All and sundry means everyone and/or everything.
on all fours = crawling around on hands and knees.
The phrase "One for All" is a partial from phase "All for one and one for all". It originates from Latin. It is known as the traditional motto in Switzerland.
One out of many
The phrase is Jack of all trades and it means someone who is a pretty good at everything, however, the full phrase is, "Jack of all trades, master of none" which speaks for itself.
The phrase "eat me" can be used in many different ways with very different meanings. One meaning is sexual and refers to oral sex. Another meaning for the phrase "eat me" would be to use the phrase as a way to say one individual is better than another.
It means you want to do everything that you can in that situation.