What does "ape in" mean?

To pile into a position big and fast, research optional.

Borrowed from crypto: apeing in is seeing a market and slamming max stake within seconds, because the story is exciting and thinking is slow. The opposite of the sharp's patient sizing.

The market doesn't punish apeing directly, it punishes apeing into thin markets, where your own stake shoves the price and hands you terrible slippage. If you must ape, ape into deep pools.