A female who runs off with another's man. The man in question tends to be a chef, and she is likely to be helping him to make canapes for large catering events. She often has a fishy smell due to the continued handling of caviar and smoked salmon for the canapes. One should be wary of the presence of a possible canape bitch when one is dating a chef.
girl 1: so what happened last night then?
girl 2: oh, my chef boyfriend ran off with a canape bitch
girl 1: yeah, that short fat blonde bitch did look like a canape bitch.