noun
tightwad; miser; penny-pincher
Colloquial term for a stingy person who is overly careful with money. Often used in casual conversation.
彼はがっちり屋で、友達にコーヒーすらおごらない。
He's such a tightwad he won't even treat his friends to a coffee.
あのがっちり屋の社長は、社員の給料をなかなか上げない。
That miserly company president rarely raises his employees' salaries.