Meaning of 「さいってー」 as an interjection


What is the meaning of 「さいってー」 in the following dialogue?

[![enter image description
here](https://i.stack.imgur.com/roMNJ.jpg)](https://i.stack.imgur.com/roMNJ.jpg)

Context: before this scene, the character on the left has just explained to
his accomplice on the right why he decided to betray and kill some of their
friends, the scene ends after the dialogue above. I know that さ means
something like "well" when used alone, but I've never heard of さいってー. Is it a
synonym of さて?. Thank you for your help!




I believe that it's a form of 最{さい}低{てい} - the lowest. Which means something
along the lines of 'that sucks' or 'you suck'




I believe that it's a form of 最{さい}低{てい} - the lowest. Which means something
along the lines of 'that sucks' or 'you suck'

