Means one of two things.
1:
Something one
guy tells another to make a point.
2:A type of crucifixion where you are tranfixed to a fence
post by having your pecker nailed to it where you will have to stay till you die or someone comes along to rescue you.
1:Hears the
keys to my car.Put a dent in it and I a nail your pecker to a fence
post.
2:There's that queer again.Lets nail his pecker to a fience
post.
And that is the meaning of nail his/your pecker to a fence post.