חפשו מילה כלשהי, כמו swag:
 
1.
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.
מאת hollowbob 9 בספטמבר, 2004
 
2.
Where a woman is taking a fat ass shit, whilst she is being eaten out. Similar to the Blumkin but the roles are reversed.
Come on in here baby and give mama a grumpy munchkin. Don't let that tongue slip!
מאת D-Dogg77 28 בינואר, 2010
 
3.
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.
מאת munchkinator 11 בינואר, 2010