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.
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."
Whenever someone finishes taking a shit and decides to lazily leave their toilet paper in the trash can, but in this case the person leaves the toilet paper with the shitty side facing upwards for all to bask in its glory.
I enjoy leaving my toilet paper sunny side-up so that my brother can see my shit stains daily.