Is “Flexing” a Scrabble word?
Yes
FLEXING
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Flexing
/ˈflɛksɪŋ/
verb
1.To bend something.
2.To repeatedly bend one of one's joints.
3.To move part of the body using one's muscles.
noun
1.The action of the verb flex; a bending of something, a tightening of the muscles.