1) The mouth of any member of the female persuasion (women, homosexual males, etc.). (usually derrogatory)
2) any member of the female persuasion (women, homosexual males, etc.).
1) Hey, shutyer cockholster.
2) Hey, cockholster! Shut yer cockholster.
Having sex so much that there is a dick in you more often than anything else. It in there so much that you are really no more than a holster for someones cock.