Green’s Dictionary of Slang

buel n.

[SE body + fuel]

(US campus) food.

[US]Eble Campus Sl. Apr.
[US]Eble Sl. and Sociability 38: Although blends are fashionable in the marketplace, college slang makes little use of this process of word formation, with only about a dozen examples collected since 1972: buel (body + fuel) ‘food’.