The small circular piece of metal (usu. brass) at the base of a bullet, where the firing pin in the chamber of a firearm hits to make a spark and ignite the bullet's powder.
Student: Why can't we use that bullet? It's a 9x19mm, isn't it?
Instructor: Yes, but it's a dud.
Student: What?
Instructor: As you can see, there is a dent in the primer. It was hit by the hammer, but did not spark, and therefore did not eject from the barrel.
by GameBoy83 May 12, 2006
alcoholic beverages consumed at someone's house/residence before an evening of partying at a bar or nightclub, the premise being to save cash which you would otherwise have to spend at the establishment in order to get fully buzzed.
"let's pick up some primers before we go bar-hopping tonight."
by hipster November 24, 2005
The girl or woman that accompanies a prostitute on a multiple trick call. The primer's job is to give the tricks a brief blow job, so as to shorten the time the actual prostitute must spend with each individual. Also know as the "sucker".
We can't go up north to the plant until we get the primer. There are ten guys there and it will be too much work without her.
by Sean Layman May 12, 2006

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