Much like a Cleveland Steamer or a Hot Carl, except instead of shitting on your partners chest, you shit on their forehead
My girlfriend said she wanted to kink it up in the sack so I gave her a grumpy munchkin last night.
by munchkinator January 11, 2010
A woman whom is taking a dump sitting on the toilet, while at the same time has a man standing in front of her for whom she is providing oral pleasures
The woman taking a shit became a grumpy munchikin when i dropped my dick in her mouth.
by hollowbob September 09, 2004