Diane: Do you know the difference between you and a fat, braying ass?
Sam: Nope.
Diane: The fat, braying ass would.
Sam: Speaking of fat, braying asses, you're about to get dumped on yours.
[Diane slaps Sam, he slaps her back]
Diane: How dare you slap me!
[Diane slaps Sam again, he slaps her back again]
Diane: Don't you ever hit me again!
Sam: Like hell.
[They carry on slapping each other]
Season 3
Sam: Nope.
Diane: The fat, braying ass would.
Sam: Speaking of fat, braying asses, you're about to get dumped on yours.
[Diane slaps Sam, he slaps her back]
Diane: How dare you slap me!
[Diane slaps Sam again, he slaps her back again]
Diane: Don't you ever hit me again!
Sam: Like hell.
[They carry on slapping each other]
Season 3
Diane : Do you know the difference between you and a fat, braying ass?
Sam : Nope.
Diane : The fat, braying ass would.
Sam : Speaking of fat, braying asses, you're about to get dumped on yours.
[Diane slaps Sam, he slaps her back]
Diane : How dare you slap me!
[Diane slaps Sam again, he slaps her back again]
Diane : Don't you ever hit me again!
Sam : Like hell.
[They carry on slapping each other]
Season 3
http://www.tv-quotes.com/shows/cheers/quote_1337.html