A loosehead prop lines up for the scrum on the left hand side of the hooker in the front-row, and the tigthead on the right hand side of the hooker. When the two front-rows interlock with each other for the scrum, the loosehead has one side of his head out of the scrum (the left side), and scrummages against the opposition tighthead. The tighthead has both sides of his head in the scrum, and scrummages against the loosehead.
Prop#1: Get your ass over here Carmen!
Prop#3:(to other prop)ohmigod when is she ever gunna get it?
Props, short for Propers, -Don't forget that the entire word "propers" is used in the song "Respect", written by Otis Redding and most famously recorded by Aretha Franklin in 1967. At least, I think it is ("all I'm askin' in return honey is to give me my propers when I get home")-