The act of leaving an unwiped, unflushed turd in the toilet of a public restroom. Typically, the initiator will take a dump in one stall and then switch to another stall to wipe and flush before leaving. The intent of a San Onofre Switcheroo is to confuse/disgust those who enter the stall next and make them believe that there is someone out there who didn't wipe before leaving.
Aaron: I'm bored, I think I'll leave a San Onofre Switcheroo in the restroom so it can surprise whoever uses the stall after me.
Zach: Dude, you're disgusting and childish.
Zach: Dude, you're disgusting and childish.
by Mizvsaki March 8, 2024
Get the San Onofre Switcheroomug. by Green bean rat hole April 26, 2023
Get the San fan siscomug. by darealhcp May 22, 2023
Get the San Ramonmug. The most beautiful and genuine man you’ll see, he owns the stage like no other with his charisma and dance skills. He’s the sweetest boy with the warmest smile and his personality is priceless.
by SanieShiber November 21, 2021
Get the Sanmug. by Sexydimma January 21, 2023
Get the San Francisco mudmug. 
A caring, considerate, thoughtful, optimistic friend.
He's like your another mother when you are away from home.
He's like your another mother when you are away from home.
by Caramel pudding November 22, 2021
Get the Xing Sanmug.