Swerve text is when you're texting someone and you think they're into you then at the last minute they send you message to blow you off.
Ashley: Hey, I've been thinking about you.
Brian: oh really? Want to come over?
Ashley: hmm, not today I got other plans.
Brian: Damn, just got swerve texted, I see how it is.
Swerve and perv is when someone is driving and takes his eyes off the road in order to check out girls that are in another vehicle or walking on the sidewalk. This results in the car swerving while he is perving.