A Gongler is someone who removes an entertainer from the stage when they do something that is supposed to be entertaining but turns out - it is not.
A good example of a Gongler would be the
clown, "
Sandman" from "Live At The Apollo."
He would show up during a bad act, get the performer off the stage, and do a bit of a
dance himself to entertain the audience as the next act is prepared.
"Did you see that
show last
night about the man with his trained snails ?"
"Dude, that was so bad. The Gongler came out and swept him off with his
broom."