This is the 852nd most frequent Vietnamese word.
gà
"Chicken."
Here, 'gà' refers to the animal, which is a chicken.
Tôi nuôi một con gà trong vườn.
I raise a chicken in the garden.
In this context, 'gà' is a slang term meaning inexperienced or not skillful.
Anh ấy rất gà khi chơi cờ.
He is very inexperienced when playing chess.
'Gà' here refers to the prepared chicken meat used as part of the dish.