Definition 1 of 2
Yohan: no. That's ancient isn't it?
Definition 2 of 2
Derived from, presumably, the sanskrit word for elephant (gaja). Made gaja popular, however, by students in Indian educational institutions of highest order.
Ranjith: What? First hand, unlocked aa? Gaja unlikely I think.
Suresh: Dai, hero, what are your chances with that new Nalini girl machaan?
Raju: That first year hottie aa? Gaja slim da. She is not even giving me one look.