A term used when no other response can be conjured. Often after a great pause that only furthers to degrade one's intellect.
Often confused with Ooeeeer (containing more than 2 letter 'e's) Which is a girl's response to seeing a dead frog.... or male scrot sack.
Person A: Your mom is fat
Person A: Thus proving i invented gravity
Tramp: On the contrary my dear Person A, I have proven you did not
Person A:....... Ooeer!!