the guy at a party who takes two or more girls into the basement, bathroom etc. and subsequently steals all the poon and laves the rest of the party to be a complete and utter sausage fest.
1. "man that guy took three fucking girls now there is none left"
"I know that guy is such a poon grinch"
Someone who sucks all the fun out of grundle tickling. Though his friends believe he will one day see the light and have a change of heart and become a grundle-leena.
Jen went to tickle Mike's grundle and he grabbed her wrist yelling at her. Mike is a grundle grinch.