To make love to a girl in a hardcore fashion (to shag the brains out of her)
See that girl over there, im gonna write her off later.

Mike: Alrite Jon what did you get up to last night?
Jon: Saw the mrs, put it this way she was a total write off last night.
by jellyrim May 20, 2010
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One so damaged by a single or multiple romantic failures that they may well be beyond economical repair.
He chased after her for months, but she still did not want to know. Reckon he's an emotional write-off for now.
by Crispin Cheesey September 20, 2010
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