Isobutyl
The 4 carbon branch that looks like a penis with a line of 3 carbon atoms with hydrogens all around 'em and one attached to the central of the line.
Dude1: Hah, your penis is smaller than an isobutyl
Dude2: You don't even know what a hydrocarbon chain is, you just read the Urban Dictionary definition
Dude1: No u
Dude2: You don't even know what a hydrocarbon chain is, you just read the Urban Dictionary definition
Dude1: No u