1. To induce a state of extreme gullibility into an individual.
2. To exhibit behaviour on the fringes of moral and sexual acceptability
3. To remove an individual's ability to respond meaningfully to mockery and banter in any way shape or form aside from 'oh fuck off'
1. 'We petra-fy'ed her into thinking he had erectile dysfunction'
2. 'She was so petra-fied last night she went home with 2 guys, a girl and a goat'
3. 'We prank called her, poor petra-fied thing could only respond with 'ohfuckoff'