a) An allergic reaction to cum.
b) A resistance to receive a cumshot.
c) A female that is not attracted to males. A lesbian.
My girlfriend won't let me cum on her tits. It's like she has a skeet allergy or something.
That girl looks like a dike - she must have a skeet allergy.
Any form of injury suffered by a female during the act of sex.
Also, an injury suffered by a female as a result of a cumshot to the eye.
Rachel got a skeet injury when Bill shot her in the eye.