When you have sex with a fat male lorry driver from behind, but instead of actually inserting the penis into the anus, you just thrust your penis back and forth within his arse crack, using his sweaty butt cheeks to stimulate yourself.
"I'm not ready for anal just yet, would you mine if we had a go at grutting instead?" - Fat Lorry Driver
"I tottally grutted that guy at the truck stop last night, it was rough as fuck" - Guy who fucked Fat Lorry Driver
"I tottally grutted that guy at the truck stop last night, it was rough as fuck" - Guy who fucked Fat Lorry Driver
by Major_tom September 06, 2016
A period of time where the Game Grumps are in a rut. Also known as the excrement of a dolphin after he's jizzed and bled.
"Yea the Game Grumps new episode was kind of lacking, I think they might be in a grut."
"Oh my god! Did you see that dolphin at Sea World grut everywhere?!?"
"Oh my god! Did you see that dolphin at Sea World grut everywhere?!?"
by Gamfel Garsh April 17, 2013
by M February 04, 2005
1. When the sweat from a mans sack runs down his leg and eats away the elastic in his socks.
2. Another term for chaifing or swamp ass.
2. Another term for chaifing or swamp ass.
by Biohavok May 01, 2009
Scottish food, possibly related to groats. Subject of the momologue 'Gruts for Tea' by the late Scottish writer and performer Ivor Cutler.
by wayne ruscoe April 14, 2006
by Royer September 11, 2003
The part of an opposite sex body that is only accessible by a tongue (or to a lesser degree penis) that is deeply penetrating the lower orifice's innards.
by nroslm December 18, 2016