The act of placing your testicles on the chin of your partner, whether during fellatio, receiving a rimjob, or as a simple prank.

Can also be used in the past tense as: Chinstrapped.
1. Jill got chinstrapped at the party last night.
2. I heard Jack likes chinstrapping Gina while she licks his b-hole.
by Mr. Phx February 7, 2013
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Utterly knackered...AKA breathing out of your arse...refers to the fact that you're hanging on by the chinstrap of your helmet.
I ran 10k's last night, I was utterly chinstrapped afterwards.
by HeeBeeGB July 24, 2006
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Refers to the style of facial hair given instantaneous worldwide prominence in the wake of Whitey Ford aka Everlast from the Irish rap group House Of Pain. Pencil-thin crawl of hair alone the jawline,optionally including moustache with demerit points. Who sports the Chinstrap: Everlast,Gotti boys,50 cent,Norte Dame Fighting Irish Leprechaun,Italians,Irish,White Boys,Latinos,Blacks and so on. Better term: Chinstrap Beard.
1. Yo I can't see my girl yet I got to get my chinstrap lined up and get my hair faded.

2. Yo who changed my settings on my facial trimmer?

3. Yo Vinnie when is Joey going to get out of the bathroom he is trimming his chinstrap but he has been in there for an hour now.

by bigryhn October 27, 2005
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The facial hair that connects from ur side burns that is lined up all the way around.
Yo,i don't feel like shaving so lets hook up these chinstraps.
by Euroman February 26, 2005
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According to Murphy from Sealab one could assume that chinstrap means:

1. A jerk
2. A jock
3. An asshole
4. Anyone you do not like
5. or anyone named Marco
::punches guy in the face::
"How do you like me now, chinstrap!?"
by l=f(d) April 7, 2006
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Use instead of saying "chinstrap beards or stalkers with chinstrap beards"
Dude: Mike is such a fucking little Chinstrap biacth!
Bro: Yeah he followed us around and his creepy Chinstrap rubbed on my arm, ewwww!
by chinstrap May 2, 2009
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The thing that keeps a helmet on your head.

Makes you look goofy, which is hard to do since you already have a helmet on your head and you're forty-seven.
"Bob... Bob, seriously."

"What now, Stan?"

"Bob... fucking unbuckle your chinstrap."

"Then what's the point of the helmet, Stan, huh, what then?"

"Then you fucking take the helmet off! You're an embarassment to men. Look, look at that five-year old over there. She's got a helmet on. Your forty-seven, Bob. Wait, just watch this... hey little girl?"

"What you old hags?"

"What do you think of this guy..." *thumbs over*

"The douchebag with that helmet?"

"Hey, I'm not a douchebag you little punk! And you have a helmet on too!"

"Um, yeah, because my mom tells me to; and it's also where I store my weed. Want some?"

"Fuck yeah, how much for a dime?"

"Stan wtf?!"
by cag April 1, 2007
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