Brainshank

Brainshank:
Verb
A form of psychological abuse:
1) an attempt to destroy another's perception of reality or drive insane by manipulating small elements of their environment, and subsequently insisting that they are mistaken or misremembering when they point out these changes.

2) the intent of making a victim doubt his or her own memory, perception, and sanity. Instances may range simply from the denial by an abuser that previous abusive incidents ever occurred, up to the staging of bizarre events by the abuser with the intention of disorienting the victim.

A practical joke, prank

Manipulate, deceive, control