Green’s Dictionary of Slang

supe v.

[supe n. (2)]

(US campus) to act as a toady.

[US]L.H. Bagg Four Years at Yale 48: Supe, a toady, a boot-licker. Used also as a verb.
[US]Atchison (KS) Globe 24 Apr. 3/4: He must help out cars and ‘supe’ around.