A while back I stumbled (via Netflicks) onto Ocean's 11 -- BTW, great movie, and 12, and 13 (just released in theaters). In 11, there was the following quote:
Quote Originally Posted by Basher
Oh, leave it out! You tossers! You had one job to do!
I'm guessing that, due to the accent, Basher is supposed to be descended/originated from England. Toward that end, I'm assuming that this phrase is also an English saying. So, what does the phrase "You tossers" mean? Is this vulgar, or is it just like saying "You idiots!"?

If one of you fine Englanders would give me the answer to this, I'd greatly appreciate it.