burners on high, adj. — Green’s Dictionary of Slang

burners on high adj.

[SE (after)-burner, an auxiliary burner fitted to the exhaust-pipe of a jet engine to increase its thrust]

(US campus) being in a state of sexual excitement.

1992		Eble Campus Sl. Apr.
1996		Eble Sl. and Sociability 71: Having one’s burners on high is to be ‘sexually excited’.