It’s a Goobey!

it’s·a·goo·bey interjection \ˈits-ə-ˈgü-bē\
– used to announce or confirm a Goobey sighting; individuals who unintentionally entertain and/or dismay onlookers

Variations: He’s a Goobey, She’s a Goobey, You’ve been Goobied

Example sentence:
“Gary tucked his shirt into his underwear again…”
“Oh yeah, he’s definitely a Goobey!”