godan verb (-ku), intransitive verb
be greedy; devour greedily
Colloquial and somewhat rough; describes someone eating or grabbing food with intense, often unrefined hunger. Also used figuratively for eagerly pursuing something.
See also: がつがつ
彼は出された料理にがっついて、あっという間に平らげた。
He greedily devoured the food served to him and finished it in no time.
そんなにがっつかなくても、食べ物はまだたくさんあるよ。
You don't have to be so greedy; there's still plenty of food.