POKIEST
Scrabble letter values: P3O1K5I1E1S1T1 = 13
Definition
POKIEST is the superlative of POKY.
noun POKY: a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence).
Synonyms of POKY: jail, jailhouse, gaol, clink, slammer, pokey