to hit on and make friendly with a new person.

Joe has been chatting up all the girls at the party, hoping to find one that will accually go home with him.
by c shawn November 10, 2006
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To speak to someone with the intent of eventually engaging in sexual intercourse with them. Generally conducted in a relaxed, playful and outstandingly obvious manner.

Almost invariably carried out by men on women; to be a male recipient means you're either extremely lucky or the giver believes you, as the British say, to bat for the other side.

A common, braindead, and therefore quintessentially British phrase, which explains the strange and nonsensical definition(s) sitting next to this one. To chat up is a type of the unfortunate word of banter, which shares all three properties mentioned above.
Guy 1: "Cor, look at all the fit birds in the place!"
Guy 2: "Yeah, I'm gonna chat up the one in the tight black skirt. Phwoar!"

Guy 1 walks in hungover and bruised.
Guy 2: "What did you get up to?"
Guy 1: "I got trashed and started chatting up this stunner. I started pulling and I was all set to bang her but then her boyfriend came back from the bar."

A couple are at a restaurant. The girl goes to the restroom while the guy places the order. When she comes back, the guy and the waitress have just finished talking.
Girl: "I can't take my eyes off you for a second. You were blatantly chatting her up."
by Isacki February 19, 2009
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you speak in chat
chat -up in the meeting

chat-up a noun
by ralasila May 25, 2021
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The word used to tell someone to chat online

To use the chat feature in a virtual meeting

The complete opposite of shut up, except using an online chat tool.
Please chat up?

Are you going to chat up?
by May 25, 2021
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When you have a deep, integral conversation about something important with your mates. (And yes, in england, we call them mates not homies)
Isaac and logan were chatting up shit about how they had caught cameron doing drugs xD
by Lonewolf 0 July 29, 2022
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a chat up line designed to shock and amuse
a cheeky chat up line is: call me butter coz I'm on a roll OR call me flora coz i spread easily
by aliceu February 28, 2012
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"we hadn't seen each other in ages, so we spent hours just chatting it up"
by Anonymous October 30, 2001
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