grundlingus 

The high art form of making sweet passionate tounge love to the space between a man's balls and anus. Similar to its female counterpart, cunnulingus.

Guy: Man, what happened last night?

Dude: We got wasted last night, and then Michelle gave me some serious grundlingus!

Guy: Hell yeah!!!

grundlingus by AaronTimothy November 8, 2005

grundlelingus 

the act of licking a grundle

Ben, a grundle connoisseur, expertly gave grundlelingus to Eric's expectingly sweaty and hairy grundle

grundlelingus by jdubbs January 26, 2006

grundling 

Nosing around the grundle area -- usually performed by a dog trying to get your attention (aka crotch-sniffing) or another person REALLY trying to get your attention.

"Dude, get your dog off of me!"
"Oh, sorry man. Spike! No grundling the guests!"

grundling by YodaDoe December 27, 2004

Grundling 

The act of taking your strong arm and feeding it under an unsuspecting friend's legs as he stands and lifting him up by his grundle. This will cause extreme pain of the marble sack and or loss of baby makin mojo.

Jose snuck up behind serg and was grundling him into oblivion.

Grundling by Valente Bros. January 13, 2008

groundlings

People who are stuck on the ground all the time.

A non-pilot.

Someone who can't fly.

Also, Groundhog.

"Wow, look at all those groundlings! It's too nice a day to be stuck down there!"

groundlings by Athene Airheart March 14, 2004

grundlitus 

Stinging in the grundle region and inner thighs while walking, usally after a heavy case of swamp ass or swamp nuts.

To this day there is no found cure.

John- Why are you walking like that?

Bill- Cuz I got a wicked case of grundlitus.

grundlitus by SB2K November 7, 2007

Grundling 

When two men rub their grundles together to get off; this act is much like when two women scissor each other.

“I was grundling Phil so hard last night, that my taint hurts something fierce” Cory said, exhausted from his tryst

Grundling by XxFrictionxX May 31, 2019