Yes, CUCKOOPINT is a Scrabble word!

Letter values in Scrabble US: C 3, U 1, C 3, K 5, O 1, O 1, P 3, I 1, N 1, T 1.

Is it a valid word?

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

common European arum with lanceolate spathe and short purple spadix; emerges in early spring; source of a starch called arum

Also: lords-and-ladies, jack-in-the-pulpit, arum maculatum.