It's a joke bomb when you hear the joke and don't laugh right away... but a minute later boom you are laughing your head off.
It's a delayed reaction. You hear the joke and you don't react that it isn't funny, you just experience a delayed reaction, either laughing or by saying "OMG I get it!" - just doesn't twig right away.
AKA JOKE GRENADE.
Comedian: PUNCHLINE.
Audience: Laughs.
You: Silent..
You: Sudden guffaw...
Friend: Ha HA - Joke Bomb!
9👍 2👎