Top Definition
Looking after you're mate's girlfriend while he's away (for a short or long period), and treating her as if she was your own.
Person 1: "Who's that girl that James is with? Is that his mrs?"
Person 2: "Nah, he's just girlfriend sitting for a few weeks"
#girl #friend #mate #gf #sitting
by Pillobeam September 13, 2009
5 Words related to Girlfriend Sitting
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