The way
retarded people spelt "grille", until it actually caught on to the public. The origin came from slick rick, as half of his teeth were gold.
It came from the front grille of a car, which in fact is spelt g-r-i-l-l-e.
If you don't add an 'E' then it doesn't make any sense, I mean..how the fuck do you relate a BBQ grill to your teeth?
The
revelation from a car's grille to a mouth grille is because they are both in front of one(s).