The suspect excuse that a mate gives you for not going somewhere, or doing something. Named because the real reason for him not going somewhere or doing something is that he is a wimp, and therefore has no penis.
Person 1: 'Have you herd why Alex isn't coming today?'
Person 2: 'No, do tell'
Person 1: 'He's ill, and last night he was "throwing up all through the night"'
Person 2: ' A cockless excuse if i ever herd one'
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.