Usually means awesome, fabulous, wonderful...
stuff to that effect. It has a
German origin. Can be
used sarcastically.
Example #1
Dude 1- "Wonderbar. I just finished my term-
paper!"
Example #2
Dude 1- "I
broke your table last night after we got
drunk."
(Akward pause)
Dude1- "Well...I'll see ya." (runs off)
Dude 2- "Wonderbar"