Green’s Dictionary of Slang

(US campus) to study in a library; libe out, to go to the library.

1915		DN IV 236: Libe. Library, n. and v. Meaning as a verb ‘to study in the library.’ ‘I’m going to libe a little.’ [HDAS].
1967–8		Baker et al. CUSS 151: Libe out Go to the library.