Shirley... funny

I think it's in the first or second season (those were the best)

The gang's at the soda shop of course, I don't recall what leads up to it. Of course it's Rerun and Shirley and the fat remarks, I think Rerun says something about Shirley being fat and he runs out of the soda shop, Roger and Dwayne laugh and Shirley, asks them something like: "Was that funny, You heard something funny? I didn't hear anything funny!" (they stop laughing as she starts to walk away keeping an eye on them as if to see if they start laughing again) ...she says "...something funny?"

She had a Richard Pryor type of delivery, loved her on the show.