Is “Messing” a Scrabble word?
Yes
MESSING
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 Messing
verb
1.(transitive, often used with "up") To make untidy or dirty.
2.(transitive, often used with "up") To throw into disorder or to ruin.
3.To interfere.
“This doesn't concern you. Don't mess.”
verb
1.To take meals with a mess.
2.To belong to a mess.
3.To eat (with others).
“I mess with the wardroom officers.”