Green’s Dictionary of Slang

1. (US) to render sticky.

1914

Ade ‘The New Fable of the Speedy Sprite’ in Ade’s Fables 24: She [...] enveloped a ball of Ice Cream gooed with Chocolate.

2. (Aus., also goob) to spit out a lump of phlegm.

1941

Baker Popular Dict. Aus. Sl.

3. (US black) to feel stupid, angry, stuck.

2000

Ebonics Primer at www.dolemite.com 🌐 goo Definition: to feel stupid, angry, stuck, when something someone says stops your ability to swallow correctly, or to take a dumbass look off your face. Example: Look he got you goo, let me see you swallow.