(dī'nə-mīt') A powerful explosive used in blasting and mining. It typically consists of nitroglycerin and a nitrate (especially sodium nitrate or ammonium nitrate), combined with an absorbent material that makes it safer to handle.
(also dyno-mite) Excellent; superior; super: ''Dynamite. I knew we'd get along/ DYN-OMITE! The Blammo 12-gauge has a precision-cast hollow-core slug with stabilization tail fins for accuracy at long range
Heroin or cocaine of high quality: a connection who deals in good-quality stuff, ''dynamite''(1920s+ Narcotics)
Marijuana, esp a marijuana cigarette (1950s+ Narcotics)
Something very disturbing or dangerous; a sensation: Don't talk about it, it's dynamite(1930s+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source