Any object, especially a picture of your girlfriend, used to cover up the check engine light in your car. Most people that use a CE blocker are too broke to fix their car and don't want to see that their check engine light is still on.
Duder 1: "Oh is that your girl? Damn you love the asians."
Duder 2: "Yeah it's only there to cover up this."
Duder 1: "Oh snap! Nice CE blocker. How long has your check engine light been on?"
Duder 2: "For like 6 months."
11👍 3👎