The few seconds during a porno, or sexy scene in a movie that just kills your erection dead. Either the camera cuts to the hairy cum-face of the man, some pet or animal comes on set, or something particularly gross happens, killing the mood.
'Ah man did you watch 'horny home alone amateurs 11'? I was just about to shoot my load when her dog comes in the room and starts barking, fucking flopshot should have been edited out.'
A flopshow is a 'friend' who let's you down on a social occasion. For example, all other friends plan to attend a night out, but 1 friend lets you down.
When a man will search for hours to find something that is laying out in the open on a table. Items are often easily found by a women.
Man: "I have been searching for hours for keys."
Woman: "You mean the ones sitting there on the coffee table?"
Man: "Where?"
Woman: "Right there in the middle of that table."
Man: "oh, must have been Male Pattern Blindness"