Over 9000
Whenever there is a query, statement, or question in which the response can be numerical, "Over nine thousannnnnnnnnnnnnnnnd!!!!!!!!!!!!" is usually an accepted response. The same statement can be applied to queries, statements, and questions in which the response cannot be numerical.
It was first uttered by the character Vegeta from Dragonball Z when the character Nappa (also from DBZ) asked him what the power level of the character Goku (also from DBZ) was.
Vegeta scanned him using a scouter (it's an eyepiece thing) and it told him that it was above nine thousand. In astonished anger Vegeta took off the scouter and crushed in his fist while exclaiming that "It's over nine thousannnnnnnnnnnnnnnnd!!!!!!!!!!!!!".
Then, things got out of hand. WAY out of hand. (The second one is funnier)
Fun fact: In the original Japanese version, Vegeta exclaims that "It's over eight thousand!". But in the English dub the words don't match his mouth movements so they stretched the word "thousand" and made it nine thousand instead of eight thousand.