Who said "Mmmmph mrmph? (Don't you care about anyone but yourself?)"?

This quote is attributed to Kenny McCormick.

Mmmmph mrmph? (Don't you care about anyone but yourself?) - Kenny McCormick

"Mmmmph mrmph? (Don't you care about anyone but yourself?)"

Kenny McCormick Kindness

"Mmph mmph mrmph!"

"I'm not fat, I'm just big boned"

"Dude, we're in third grade"

"This is so cool"

"A good man treats his wife with respect."

"Kindness always comes back around."

"The power of a smile can change everything."

"Kindness is weakness to some. Not to me."