Just launched! Learn slang while watching funny vids: urbandictionary.tv
2. laughback
The sound that a person makes when they inhale after a laugh. Sometimes it sounds like a drawn-out gasp, hiccup, or choke in the back of the throat.
"My laugh is so long that I run out of air and have to have a huge laughback."

"His laughback is the best part of his laugh."
1. laughback
Suddenly remembering something really funny that happened in the past.The recollection is so vivid, that sometimes one can get hurt, in not paying attention to the present.
While stepping off a dock into a boat, a laughback could cause you to instead fall into the lake.