Not liking a person or group with a good reason. Having had experience with a person, you do not like that person. A rational generalization.
After spending a year working with mechanics, i became postjudice against them, and did not trust mechanics.
rejudging someone after you have already made a judgement about them
"jane is a nice person"
"have you heard about jane's abortion?"
"jane got knocked up? she's a slut"
"you john kerry flip flopper, whats with all this postjudice"