look up any word, like bangarang:
 
1.
The most sincere expression of sympathy that remains in modern spoken idiom.
Person A: My mom just died of cancer, and I've been diagnosed with leukemia.
Person B: Wow, that sucks.
by Planeswalker_ May 25, 2009
 
2.
Used to express dismissal or annoyance.
That sucks! I lost all my fuckin' money.
by Fangsta March 17, 2003
 
3.
a word phrase used to describe something unfortunate. the phrase is most commonly used by people that were born in early to late 90s and mid to late 80s however many others still use it. the phrase has taken on a different connotation and is now considered a bad word and vulgar by many small children. this is most likely because of the possible reference to a BJ
person 1: my dog died
person 2: oh that sucks man i am so sorry
person 1: thanks but don't say that sucks my little brother is around and he was not born in the 90s
person 2: oh sorry i forgot that it turned into a bad word
person 1: it is okay i still use it out of habit sometimes too.