Green’s Dictionary of Slang

cereb n.

[abbr. SE cerebral]

(US campus) one who works exceptionally hard.

[US]L. Birnbach Official Preppie Hbk 90: 13 Words For The Person Who Is Working — 1. Grind 2. Squid 3. Pencil Geek 4. Cereb 5. Grub 6. Weenie 7. Throat 8. Tool 9. Wonk 10. Gome 11. Nerd 12. Spider 13. Conch.