insidergame

noun
UK /ˈɪn.saɪ.də ɡeɪm/
US /ˈɪn.saɪ.dɚ ɡeɪm/

A game where someone uses secret knowledge that only a few people have to win.

The trader treated the stock market like an insider game, buying shares before the news went public.


OTHER MEANINGS

2. A game played by people who belong to a special group and know its hidden rules.

Among the old club members, golf was an insider game with its own unwritten customs.

3. A situation in business or politics where only a small group controls what happens.

Critics called the contract awards an insider game that shut out small companies.

4. A puzzle or activity that requires knowledge only insiders have to solve it.

The riddle was an insider game, full of references only longtime fans would understand.