Green’s Dictionary of Slang

1. (US black) unattractive.

1997–2002		Hope College ‘Dict. of New Terms’ 🌐 chauncy n. Used when calling someone a ‘dork.’ [...] If someone tripped on his shoelaces and fell down a flight of stairs, you might say ‘Nice move, chauncy’.
2000		Ebonics Primer at www.dolemite.com 🌐 chauncy Definition: ugly ass nigga. Example: Nigga, you is a bitch ass chauncy.

2. (US campus) sexually excited.

2000

Eble Campus Sl. Spring 2: chauncey – sexually excited. ‘Looking at Brad Pitt makes me chauncey.’.