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A particular type of girl who will drive upwards of 15 min to your house to have sex with you once a week from 8-9:30pm. She is allowed to visit other times only if she is bringing food. She cannot enter the house though. She is not your girlfriend.
Guy 1: Is that your girlfriend upstairs?
Guy 2: No, she's my 8-9:30 girl.

Guy 1: Do you have plans tonight?
Guy 2: No, my 8-9:30 girl is just going to drop off some lobster.
by TwinKss September 09, 2009
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