Skin one means to s*ck a d*ck.
When I was a kid and my dad was about to kick someone's ass or was mad.. He'd tell them to go skin one.
A joint rolled with shorter papers, which are generally used for rolling cigarettes.
These are useful when smoking incognito - like at a club or in public.
Stoner 1: I’m pretty gronxed but I want another zoot.
Stoner 2: ah yeah, maybe just have a one skin?