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 18, 2009
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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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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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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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Talking sexy to someone knowing full well where it will eventually lead.
I'll chat you up late tonight, baby.
I am so gonna chat him up tonight.
by Rulee December 06, 2008
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