According to the Pearls Before
Swine strip from April
27,
2011, "It means, 'I just burned you. What are you gonna do about it?'" It's going to sweep the nation.
Rat: Dude, check it... I've invented a new expression... it's "
Yo. Snap. Whassa matta hamma?'
Pastis: What the heck's that s'posed to mean?
Rat: It means, 'I just burned you. What are you going to do about it?'... I'
m hoping it sweeps the nation.
Pastis: I wouldn't let it sweep my bathroom
floor.
Yo! Snap! Whassa matta hamma?!
Rat: It's a sad day when a nerd cartoonist gets the better of you.