When you are writing an essay and instead of leading into or mentioning where certain information came from, you throw in a quote. The reader has no idea if the quote is legitimate or even where it is from.
Teacher: Billy, your essay doesn't mention who any of the people are in your citations.
Billy: Opps, guess I threw one too many quote bombs in there, huh?
When you mention a quote from a notable tv show or movie in connection with something mentioned previously.
"Dude you drank way too much last night!"
"Haha, yeah I abused that toilet"
"I don't wanna, I don't wanna (puking sound)" (Family Guy ipecac puking competition reference)
"Hahaha classic quote bomb!"