The loose lips of a wellused vagina that have a unpleasant smell and or discoloration.
Hey Alfred that girl over there is the one I took home from the bar the other night: Her salmon flap was rather unpleasant, It left a bad taste in my mouth.
Where the flaps of a woman's vagina become moist and clamp, creates a rancid overpowering smell, most likely to be found withing teenage girls. Can be used as an insult