Yes, poky is a Scrabble word!
...and is worth 13 points in Scrabble, and 13 points in Words with Friends
poky
Adjective
1. Wasting time
2. Small and remote and insignificant
Noun
1. 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)
What Scrabble words can I make with the letters in poky?
3 Letter Words
2 Letter Words