餓鬼

(Buddhism) short for 餓鬼道 (gakidō): the hungry ghost realm, one of the six realms of reincarnation in Buddhist cosmology

(Buddhism) a preta: the spirit of a jealous or greedy person who, as punishment for mortal vices, has been cursed with insatiable hunger

(Buddhism) the souls of the dead who languish in oblivion without any surviving relatives to pray for their peace

(figuratively) anyone who is constantly hungry or thirsty

(figuratively) anyone who is unhealthily thin and appears as if they are starving

(archaic) Short for 餓鬼病 (gakiyami, gakibyō, “leprosy”).

(derogatory, slang, by extension from the sense of someone who is always hungry) an unpleasant child, a brat