Yes, LAMMING is a Scrabble word!

Letter values in Scrabble US: L 1, A 1, M 3, M 3, I 1, N 1, G 2.

Is it a valid word?

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

Also: turn tail, run away, hightail it, head for the hills, take to the woods, fly the coop, break away.