Goooooo: An high-pitched exclamation uttered by Seth while impersonating people he doesn’t like (pronounced gew).
Used in a sentence: “‘Goooooo I’m swimming!’ No you’re not; you’re in a bathtub, Seth, playing Michael Phelps’ fake non-existent game. Goooooo!!!!!” (Episode 146, 46:22)

Goooooo: An high-pitched exclamation uttered by Seth while impersonating people he doesn’t like (pronounced gew).

Used in a sentence: “‘Goooooo I’m swimming!’ No you’re not; you’re in a bathtub, Seth, playing Michael Phelps’ fake non-existent game. Goooooo!!!!!” (Episode 146, 46:22)

Source: uhhyeahdude.com