A pookie or "oil burner" used for smoking methamphetamine.
If you've ever been to barstow, CA, odds are you've hit that ol Barstow martini and spent two weeks trying to sleep.
The ability to fall asleep in any circumstance (eating, standing, changing the song) while inebriated from alcohol.
Shawn is always falling asleep in absurd places and positions because has alcolepsy.
Generally the tweaker charistics, (such as found in the people from Barstow, CA),can be referred to as the Barstow swerve.
It could also be used to describe a Venereal disease contracted from having relations with somebody who uses hard drugs.
John got the Barstow swerve from that crack whore he banged last week.