That 70s Show

In the 70s, every sitcom had a catch-phrase that you could count on hearing once per episode, and you could usually buy it on a t-shirt and poster.

These are the ones I can remember off the top of my head:

 

Fonzie:                              Ayyyyyyy!
Chico:                                Looking Good!
JJ:                                       Dy-no-mite!
Billy Crystal:                   You look marvelous!
Vinnie Barbarino:         Wut?  Where?  How?
Mork:                               Shazbat!
Flo:                                   Eat my grits!
Lenny and Squiggy:      Hello!