noun
fanatic collector; collecting maniac
Wasei-eigo from 'collect mania'; refers to a person obsessed with collecting things. Rare term; more common synonyms include 収集家 or コレクター.
wasei-eigo (Japanese-coined English), from collect mania
See also: 収集狂
彼は切手のコレクトマニアで、珍しい切手を探し回っている。
He is a stamp-collecting fanatic, always hunting for rare stamps.