Sunnyside up is intentionally NOT flushing the toilet and leaving a massive turd and toilet paper with the poop smear side facing up.This is done to irritate your significant other or to achieve that trendy "gas station restroom" ambience for your own bathroom.
Wife: "You nasty,gross bastard! You didn't flush the toilet and you left the toilet paper sunnyside up."
by wolfbait51 February 25, 2011
A loose saggy "oldish" ball sac that spreads out and resembles eggs cooked sunnyside up style.
"His old-ass balls were sunnyside up, yo!"
by Jessthea September 20, 2007
ADJ: 1. To leave your underwear on the floor inside out after a hard ;) day at work while obvious sticky discharge is present.

2. To evacuate from your jeans and leave your underwear still in them.

"Hey babe, you left your panties sunnyside up in my room."
by NikDor July 28, 2008
Like a sunny side up egg, the person's skin is white on the outside and has a personality of an Asian (yellow) on the inside.
"That girl is sunnyside up, she hangs out with the Asian studs but her skin is white."
by SunnySide Up March 17, 2014
The removal of the penis after having vaginal or anal intercourse, and then ejaculating on the girl's face, then leaving her outside and letting your semen cook and sizzle on her facial skin under the sunlight and heat. The practice originates in Florida but can take place in any hot regions with good sunshine. A substitution for those in cold regions can be for the girl to lay in a tanning bed and let the semen cook there.
Christian gave Brittany a Sunnyside-Up after fucking her on Spring Break in Panama City.
by pseudonym313 November 4, 2010