To seek sexual activity in a locale or quarter of dubious sexual hygiene.
A: Where's Lukey tonight?
B: Gone out on the pull in South London.
A: What, crabbing?
B: Pretty much, yeah.
by NakedAdonis March 31, 2010

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When inserting a finger into your other half's anus & a thumb in her vagina, then pinching the two together like a crab claw.
"I gave my missus a good crabbing last night, my fingers still smell now"
by Mr.Lee.Likes.Crabbing January 21, 2016

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A sexual act in which the 'crabber' has a penis in each hand and is simultaneously tugging them off and popping them into his/her mouth. Crabbing can also include a third penis performing penetrative sex, usually an act associated with a female 'crabber' rather then male.
I love having two cocks at once, crabbing is my favourite hobby
by navs20 July 06, 2011

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Most of the time this is a Female by herself at the bar, sometimes she brings a friend. She sits there waiting for anything free; cocktails, shots, money, drugs, food... posting selfies to social forums, flirting, playing man like violin.
"Have you seen Lindsay?"
"It's Friday night, she's probably crabbing at the bar."
by slightly_decayed September 18, 2015

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Profusely talking out of your arse. Exaggeraterating ability and knowledge of any subject. "Giving it all that".
Stems from the joke "A crab walks into a bar...."
Don't let me on the stella boys - coz the last time i was on it i absolutely battered this lad....
I could have played Division 1 football.
These are prime examples of "Crabbing It"
by Will January 16, 2005

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When someone goes down on a girl who has crabs.
Example 1: "I got that guy to go crabbing last night."
by MATT44E October 05, 2012

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crabbing is an act of mutual mastubation between a man and a woman. the man will place his thumb inside the females anus and place his index and middle finger inside the vagina at the same time, making his hand in to the shape of a crabs claw, whilst opening and closing his "claw"!
she was riething in pleasure when i gave her a good crabbing
by mike January 06, 2004

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