brb
be right back
Hemen geri döneceğim.

lol
laugh out loud
Yüksek sesle gül(üyorum)

b/w
between = arasinda

btw
by the way = bu arada

gmat
the graduate management admission test

toefl
test of english as a foreign language

gov
government
(as in gov.tr)

edu
education
(as in edu.tr)