It is in Ireland. The river Liffey flows from the Wicklow mountains through to the city centre of Dublin and into the Irish Sea. As it flows through the city it creates a north and south division of the city and county, referred to as the northside and the southside.
goolie edge
The leading edge
You call it... An external mouth guard.
lip
A mouth.
The mouth
A mouth.
impossible, differant bodies.
right at the edge of it's mouth
border, edge, margin, rim
you call it a edge