"I'm about to give you a sloppy gillapi."
"Rememberthat time they gave that kid with the long blond hair a sloppy gillapi at that party after he got that carrot shoved up his ass, that was so funny."
(n.) The fluttering sensation of "butterflies" in one's stomach, increased heart rate, instantly improved mood, and a silly smile.
Gillypitters are most often given and reciprocated in loving and/or budding puppy-dog-eyed relationships, but can also be caused at the interaction or sometimes the mere thought of a particularly strong crush.