(v) To dip smokeless tobacco. The term is frequently used while on the golf course, playing video games, watching sporting events, fishing, driving, or any time one enjoys a dip.
The term emphasizes the fact that the dip is "hanging" in one's mouth.
Specifically to describe the state of having a very S-L-O-W-L-Y emerging turd, or a turd that has stopped coming out and is "stuck" part way out. turtlehead
e.g. an office party, you get the types of people who show face, maybe have a drink or two then leave. Whereas others 'may hang one' on til later if they're enjoying the party
"Did you hang one on at the works do last night? "