uhm....i dont know any cool expressions as those....but i can say some old expressions in portuguese!
bacana - (as it reads...sounds like banana) just like batuta
batuta - (pronounce:ba-too-ta) something nice
broto- (bro-tto) young person
supimpa- (soup-eem-pa) just like batuta and bacana....
bicho - (bee-sho) believe or not...its a treatment pronoun (it would mean critter in english)
lá na casa do chapéu( laa naa caa-saa do sha-peo- it means 'in the hat's house' in english) very far place
tinindo (tee-neen-do) new and bright
grandes ostras (as it reads... 'big seashells') its the same for i dont care...
uhm....i donut know much...i'm still just a kid xD