[sarcastic] Oh...I beg of you...please don't hurt little old me.
The pain that you have caused me...I will return it ten-fold!
[after blasting Frieza from behind] Alright! Rule number one, never turn your back...when you're up against Vegeta!
Don't look so surprised Vegeta! I'll be right with you, but first I must exterminate the mighty midget.
[when crushing Gohan's head into the ground] Sometimes, you just gotta put your foot down when it comes to kids. Bye bye brat.
These quotes come from Wikiquote's Dragon Ball Z pages and are available under the Creative Commons Attribution-ShareAlike License.