When you laugh so hard you start to fart, which makes you laugh harder and lose control and you continue to toot along with your giggles.
Kwistin: (Laughing) Do you hear him out there muttering about Redneck Bingo? (Toot!)
Peaches: Whoa, what was that down there? Was that a butt chuckle?
Kwistin: Ya! I can't help it! (Increased giggling and tooting)
by Kwistin September 25, 2005
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noun- a fart which produces noise from the butt cheeks slapping against each other
The awkward silence was made even more awkward when Bill released a smelly butt chuckle
by NavitasXVII March 23, 2007
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n. A word used to insult somebody, means basically the same as kunckle head. Knuckle-head is to knuckles in your head, as chuckle-butt is to chuckles in your butt. Can also mean one who farts a lot.
Example 1-
Daughter who is texting her friend on her cell: Daddy, my friend just said i was stupid!
Father: Well, call her a chuckle-butt

Example 2-
Girl-Ew, Chris is such a chuckle-butt
Other girl-Tell me about it. Earlier in math class he blew one right in my face!
by The Bombdiggietest December 23, 2006
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Wide-load/Overall Large Ass dude that jiggles when he laughs like Santa Claus but year-round.
Greg: YO Chuckle Butt stop fucking laughing so hard on the couch you are gonna break the gears we can't concentrate on the damn game!

Ryan(Chuckle Butt): Shut the fuck up Greg your girlfriend's fatter than me and you let her bounce up and down on your bed.
by Greg Nicers December 24, 2010
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A chuckle butt is someone with a butt so fat it jiggles when they laugh
Ronell: Elijah is such a chuckle butt

Brian: I know right his butt is so fat I want mines to be like that
by Bigdaddyrad July 15, 2023
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When you laugh so hard you fart as you're laughing.
That joke was so funny it made me butt chuckle.
by OneDumbMarine July 10, 2017
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when you put your phone in your back pocket and it suddenly begins to vibrate.
"Oh god, I just butt chuckled.."
"That butt chuckle felt sooo goood"
by unorginal January 15, 2017
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