heavy spending on virtual goods; whaling
Used in gaming and social media contexts for users who spend large amounts of real money on in-game items, gacha, or premium features. Often carries a slightly critical or self-deprecating tone.
He spends heavily on social games.
Users called 'whales' support most of the revenue.
Compound of 重 (heavy) and 課金 (billing/charging), literally 'heavy billing'. A relatively recent term from online gaming and social media culture.