whacked out, messed up, not working for no definable reason. Usually applied to technology.
"Dude, you have the wonkiest computer in the world. I walked through the room and it crashed."
non-intuitive, poorly designed, or not functioning as it should.
The UI on that site is kind of wonky.
My demo works, but when you start clicking around things get a little wonky.
not right, odd
Jenni had a wonky eye, it was the source of all her self-esteem problems.