There's no avoiding bumper stickers-- they're everywhere. Sometimes boastful, sometimes cheesy, sometimes political, sometimes downright offensive, and other times...they're hilarious! So for a good humor rush, read on:

• Just say NO to negativity.
• I thought I was indecisive; now I'm not so sure.
• Beer doesn't make you fat. It makes you lean (against doors, tables, walls).
• I feel better after I wine a little.
• I'm still a hot babe, but now it comes in flashes.
• If it's not one thing, it's your mother.
• Never believe generalizations.
• What would Ashton do?
• Jesus loves you. But I'm his favorite.
• Does anal retentive have a hyphen?
• Every time you open your mouth, some idiot starts talking.
• On the journey of life, I choose the psycho path.
• To err is human, to blame it on somebody else shows management potential.
• Practice safe lunch: Use a condiment.
• Rehab is for quitters.
• Suburbia: Where they tear out the trees and name streets after them.
• Therapy is expensive. Popping bubble wrap is cheap. You choose.
• Warning: Dates on calendar are closer than they appear.
• Love may be blind, but marriage is a real eye opener.
• You're just jealous because the voices only talk to ME.
• So you're a feminist. Isn't that cute?
• Without ME, it's just AWESO.
• Driver carries no cash. He's married.

Source [1] and Source [2]