The act of inspiration or simply a clever way of saying some clever idea came just like that. Think of heureka, but with extra style.
"Listened to The Doors and flammo! Here comes the idea."
by Jim9137 September 11, 2005
Your Gun (doesn't matter what type), is full of ammo, therefore it is Flammo.
"holy tits, his AK is Flammo"
by Tyler Mueller July 17, 2005