Holes you put in the hood of your car with a pickaxe to (supposedly) make it go faster. These holes may also be installed via sniper fire.
Ned: Whatcha diddely-doin', neighbor?
Homer: Aw, putting speed holes in my car. Makes it go faster.
Ned: Is that so? Well, gee, maybe the old Flanders-mobile could use some
Holes in your car that makes it go faster.
Jorge said he was going to put speed holes on joes car with a pick axe.