Green’s Dictionary of Slang

mange v.

[Ital. mangiare/Fr. manger, to eat]

(US campus) to eat.

[US]Baker et al. CUSS.
[US]Eble Campus Sl. Nov.
[US]Eble Sl. and Sociability 77: French mange becomes a regular verb for ‘eat’: ‘We manged peanut butter and jelly sandwiches at midnight.’.