The word is "gypped", however it's a very offense phrase, and should not be used. It's a reference to a derogatory stereotype of the Rroma people (commonly referred to as Gypsies - which is actually also considered a racial slur by many).
Jipped, not the same as gyped cheated, stolen, dissed.
Comes from the TV Term JIP, which means Joined in Progress, the saying actually came from live tv, going over its time limits and cutting the beginning of a show in the current time slot. 'Man I got jipped'