dlç - delícia, which means delicious, something you find very good even if it doesn't relate to food
tbm - também, too, also people also use TB
tdb - tudo bem, which means fine, ok, good
oq - o quê, o que, meaning what in a question or any context. Normally the que is abbreviated as q
rsrs - it's a way of people to express laughing, could be also "hahaha" or "hehehe", "hihihi", "hohoho", "aheoahoeahoaheoa", "kkk"
vc - você
ctg - contigo, with you
pqp - puta que o pariu (it's a bad word and I don't recommend using it)