Yes, FRISKED is a Scrabble word!

Letter values in Scrabble US: F 4, R 1, I 1, S 1, K 5, E 1, D 2.

Is it a valid word?

FRISKED is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

play boisterously
search as for concealed weapons by running the hands rapidly over the clothing and through the pockets

Also: run around, lark about.