2: A Goofy fuckin' exclaimation uttered by Gomer Pyle to further make him look like a dumbass.
3: An acceptable phrase to utter during orgasm whilst having sexual relations.
2)We use it now to put emphasis on an extraordinary action
2)A: "did you get the tickets?"
B: "It didnt look good but I waited for 2 hours, some people ahead of me gave up and went home, but" *pulls out tickets* "SHAZAM!"
Philly: Whats that dear friend?
Joe:We both just got a raise and don't have to work this weekend! I just found twenty bucks,it's happy hour all week long and that hot mom over there is totally eye fucking you right now!...
Joe & Philly: SHAZAM!