The term 'prison, slangily' can be represented by the following crossword solutions: COOP (4 letters), JOINT (5 letters), POKEY (5 letters), PEN (3 letters), STIR (4 letters), THECAN (6 letters), and THEPEN (6 letters). COOP is a slang term for prison, originating from the idea of chickens being kept in a COOP. JOINT is another slang term for prison, referring to the idea of inmates being 'JOINTLY' confined. POKEY is a slang term for prison, derived from the word 'POKE, ' meaning to prod or push. PEN is a slang term for prison, derived from the idea of animals being penned in. STIR is a slang term for prison, referring to the idea of inmates being 'stirred up.' Thecan and thepen are both slang terms for prison, derived from the idea of inmates being confined in a can or PEN.