The act of jacking off when your name is Geoff or Jeff. Can also be used as an adjective for a male named Jeff or Geoff who is a jerk and asshole.
"You're being a Ge-off"
"That's Geoff, yes he's masterbating, actually he's Ge-offing"
"Man, I gotta go Ge-off"
jacking off, especially when your name is Geoff.
Geoff ge-offs on Ben's face while he's sleeping.