yo bob, can you move this skid for me and tape it when your done?  bob - umm, let me think about that, cancel on that one sir
cancel means  when someone is telling you do something, you say cancel meaning you don't want to do it
"yo bob, can you move this skid for me and tape it when your done?  bob - umm, let me think about that, cancel on that one sir" What is the definition of "cancel"?