Green’s Dictionary of Slang

reeb n.2

[? var. on dweeb n.]

(US campus) a socially inept person, an outsider.

[US]Eble Campus Sl. Mar. 6: reeb – person who is not in the group; nerd; square.
[US]Eble Sl. and Sociability 59: Derogatory epithets abound, for example [...] reeb, scuzbag.