ブラウザの設定でJava Scriptの使用を有効にしてご利用ください。
出典:Wiktionary
From place + getter.
placegetter (複数形 placegetters)
When unspecified, a placegetter is an entrant who/that receives a prize. In the absence of knowledge about the number of prizes awarded, that number may be assumed to be three.
placegetter