True story...

33 years ago I was 8 years old sitting in front if the tv with the last bowl of honey nut cheerios in front of the tv... my brother comes over naked and lifts his butt cheek to blow a fart in my direction... a drop of shit landed plop in my cheerios... "oh my God! MOM!!! <insert brothers name here> JUST TOOK A SHIT IN MY CHEERIOS!". He would say i shit in your cheerios. THAT'S EXACTLY HOW THE EXPRESSION SHOULD BE USED. TRUE STORY.
"i shit your cheerios" The cheerios dont have to be honey nut.
by ShitInYourCheerios August 29, 2017
Get the shit your cheerios mug.
To completely ruin someones day
"That guy is a dick, he lives to Shit in your Cheerios."
by Madanarx August 11, 2006
Get the Shit in your Cheerios mug.