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15.
a friend who you always smoke up, but never buys weed.
Karl, when are you ever gonna smoke us up, you grumpkin!
by Clash March 01, 2005
 
16.
After Intercourse seamen is placed on the females face, and then pubes are placed on top.
The grumpkin is the face your partner makes after the following.
Fescoe looked pissed after that grumpkin last night, what a mess.
by Chase Magee April 28, 2005
 
17.
It's actually where you get a girl to swallow a load of semen, then you punch her really hard in the stomach and she throws up on ur dick.
Ya that bitch was suckin my dick so hard but she bit it, so i gave her a grumpkin...and she puked out her lunch.
by Joe February 28, 2005
 
18.
A girl shits on your dick, then sucks it off.
grumpkin, ohhh!!!!!
by Brian December 05, 2003