as in ice cubes "check yo self" he talks about busting a "trey eight in your cranium" a trey eight is a .38 bullet, probably from a .38 special, or a saturday night special.

A pubic hair piece. A toupee for the pubic area/genitals. In the 1700’s when mercury was used to treat sexually transmitted diseases (Gonorrhea or Syphilis) one of the side effects was the loss of pubic hair. To disguise this condition, that was not cured by mercury, a Merkin was employed.

Trey Eight is a rap term for a .38 bullet, most commonly used in Carbines, Pistols and Revolvers. It is referenced in Ice Cube's "Check Yo Self", Obie Trice's "There They Go", Sheek Louch's "Turn it up", Eminem's "Greatest", Black Market Militia's "The Struggle", and Hell Razah's "Article One", among others. It is often used when referring to drive-by shootings, as in "Check Yo Self" and "Turn it up", and Eminem uses it in reference to the Mandalay Bay shooting in Las Vegas.

.38...in Obie Trice's "There They Go" em talks about drive bys with trey 8s