The act of expelling gas from ones anus directly into anothers anus, for the purpose of erotic pleasure.
Tomorrow at this time I will be gishing the hell out of that guy.
He is totally gishable.
I got gished so hard last night I think I blew an O-ring!
Hey man, wanna gish?
I could go for a nice gishing right now.
Screw enimas gishing is where its at.