"FUCK THIS HELMET, FUCK THIS PENCIL, AND FUCK THIS DIAPER! I WANNA FUCKING KNOW WHERE THAT FOUR WENT! TO COME BACK THAT FUCKING FAST TO BE MAKING ANOTHER EIGHT! IT'S EIGHT MINUS FOUR! YOU TAKE THE FOUR AWAY, IT'S FUCKING EIGHT! I DON'T CARE WHAT YOU SAY, FUCK EISENHOWER, AND FUCK ALL THESE OTHER PEOPLE, IT'S FUCKING EIGHT! TAKE THE FOUR AWAY FROM IT!"
— Jeffy, "Jeffy's Homework!"
"FUCK THIS PENCIL, FUCK THESE PANTS, FUCK MY SWEATER, FUCK MY UNIBROW, THE ANSWER IS FUCKIN EIGHT! YOU TAKE AWAY THE FUCKING FOUR, SO IT'S NOT THERE ANYMORE, AND THEN YOU HAVE EIGHT, AND THATS LEFT! SO YOU GOT EIGHT, MINUS FOUR, TAKE IT THE FUCK AWAY, AND THEN PUT A LINE UNDERNEATH IT, AND THE AWNSER IS EIGHT! FUCK IT!"
— Jeffy, "Smart Jeffy!"
"Don't forget to tell your mom oink."
— Bowser Junior to Cody, "Bowser Junior's Game Night 4"
"He's not my son!"
— Mario referring to Jeffy in multiple episodes*
"WE HAVE PENISES!"
— Joseph blowing his cover at Penelopes sleepover, "Junior's Sleepover Mission!"
