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Grundle is another word for chad: the region between the balls and the arse-hole; can be an erogenous zone for some.

Girl: I was fingering that part between his balls and his arse and there was shit there.
Everyone listening remained silent but later laughed among themselves:
'Eww! He had a shitty chad.'

When you measure your dick, you don't start at the arse-hole and include the chad; you risk getting shit on your measuring tape.
Q: What on earth is a grundle?
A: You know, the chad, the part between balls and arse.
via giphy
by Chaint. March 27, 2020
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Jul 12 Word of the Day
The horrible moment when you realise that you have accidentally done something very slightly wrong which has very bad (usually embarassing) implications for you. This is typically the moment of realisation that you just sent a dirty text message to a close member of family, typically your mother, rather than the intended recipient.
Message: "i'm free this afternoon so come over and fuck me senseless, my parents will be out all day"
Recipient: Mum
Message Sent
- Onosecond occurs here -
by Jimmed September 26, 2006
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The act of burrowing your nose into someones anus durring sexual playtime. A gluteal motor boat. Also known as a "Steam Boat Willy".
We started with the Dutch rudder, then moved on to the Dirty Sanchez, and ended with a lengthy and lively Grundle.
by Tasty time May 21, 2012
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A Jewish Grandma Troll often in an irate mood. Known to inhabit bridge underpasses in Palestine.
I was accosted by a shockingly hairy grundle as I made my way home from the meat market.
by katiethelady March 13, 2015
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The butter that grows under your thighs after a hot monday morning.
Usually found on the fat female species with a high tolerance to cottage cheese thighs.
Dude, that chick had a shitload of grundle growing under your thighs!
by Grundle Master 5000 February 16, 2009
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A large quantity of something awesome, can also be used as a measurement of some thing awesome.
There are a grundle of tattoos on that man's foreskin.

That chip is going to make you car a grundle load faster.
by bamf bromine April 05, 2011
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