I guess it will be a variant of "cara'e poto" or "cara de poto" ("face of ass"). See enculado , encularse , care culo , care raja , face of raja .
CARE POTO nickname that is given to people with plump cheeks that resemble buttocks. 2 . Person with an angry face Some synonyms, words or similar expressions can be car 39 , e poto , car 39 , e culo