Seth Stevenson tells you more than you ever wanted to know about the word “suck” in Slate:
“We could argue all day about whether sucks is an obscenity or not. […] What’s far more interesting to me is the word’s utility.
Sucks is the most concise, emphatic way we have to say something is no good. As a one-syllable intransitive verb, it offers superb economy.”
Read it though and you’ll admit that it would suck not to have the word suck available in daily conversations. ;)
Now, I can’t help but remember Adam Curry citing his daughter pushing it to the next level:
“It sucks so bad (that) it swallows!”
Ouch! :>