Friend towel
When you have some kind of gnarly grossness on you and you dont have a towel, you use a friends shirt/ body to wipe it off. you wouldn't want to do it to a stranger just because you dont know where their nasty selves have been. only the best of friends are used as friend towels.
dude i just touched something, and it smells like a mixture of baby shit and febreeze.....i could really use a friend towel right about now...