juny cakes 

this is slang for ass often in prison juny cakes means the rectum of a inmate
asking for juny cakes in prison refers to helping a inmate hide something using your rectum

can i borrow those juny cakes

juny cakes by big gunline July 13, 2017

junicakes 

Prison slang for your ass.

Fish: (eating honey bun)
Big bubba: hey what you gunna do with them junicakes

Fish: uhh my honeybun? You can have it.

Big bubba: I can have your junicakes?
Fish: uhh sure here take it.

Big bubba: ok I'll be coming for those junicakes later.

Fish: shrugs in confusion

junicakes by After prison show February 17, 2017