The act of oral sex, in which two people are involed. The giver, is gracefully putting his penis inside of the recievers mouth. During this act, the giver hammers the back of the recievers head on to his penis. This action suggests a nail going into a wall.
Thad- "Bro I got the best blowhammer I have ever recieved last night!"
Chad- "Bro... Luckyyyyy ):"
The inability of a male to recognize that his significant other is crazy because he is engaging in regularintercourse or receiving oral sex from said significant other.
John: Why does he stick with her even though she keyed his car?
David: It's because he has Blowjob Blinders.