Playing Minecraft and thinking you have an item in your inventory, but when checking a second time, noticing it isn't really there. Or, seeing something in-game, and taking a double-take only to realize what you saw was never there. Similiar to Mind Fuck.

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.

Typically refers to fucking on MineCraft but has been generalized to any sexual act commit in the blocky world of MineCraft. Very common on 2b2t, where you can buy paid MineCraft prostitutes for real world money. SkittleMC is another great place to look but all the whores there are cheap and passionless and don't rob'n'grief your base post-sex.