Yes, FUDGING is a Scrabble word!

Letter values in Scrabble US: F 4, U 1, D 2, G 2, I 1, N 1, G 2.

Is it a valid word?

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

tamper, with the purpose of deception
avoid or try to avoid fulfilling, answering, or performing (duties, questions, or issues)

Also: put off.