An inferior sexual climax, usually very muted and of short duration, that leaves one generally unsatisfied or with a feeling of lack, the cause of which can vary, but some of the reasons can be: an unattractive partner, a particularly bad partner, lack of a partner, distraction/preoccupation with something else, severe intoxication, among others.
George: How was your date with Crystal last night? Did you score?
Jerry: Meh...yeah, but during the act, I began taking a good, long look at that weird mole on her neck - did you know there are 7 hairs growing out of that thing? - anyway, I kept staring at it in a repulsed trance - I couldn't tear my eyes away - and I only managed to pop off a microgasm.
George: Are you going to see her again?
Jerry: ...I don't think so.