To be greedy or to devour greedily; to snarf down food or eagerly pursue something (money, success, etc.).
彼は空腹で皿に盛られたご飯にがっついた。
He hungrily dug into the plate of rice.
新人なのに仕事にがっつく姿勢は評価されることもある。
Even as a rookie, an eager, go-getter attitude toward work can sometimes be appreciated.
飲み会でお酒にがっつくのは印象がよくない。
Being overly eager with drinks at a party doesn't leave a good impression.