Green’s Dictionary of Slang

dragon n.5

[abbr. dragon breath n.; i.e. such a person ‘breathes fire’]

(US campus) a person with particularly bad breath.

1989
198919901991199219931994199519961997
1998
[US] P. Munro Sl. U.
[US]Big L ‘Ebonics’ 🎵 If you got the dragon, you got bad breath.