A "definitely not gay" gay sexual activity between two bros wherein a
man stands over a second
man who is kneeling while both parties are nude. The first
man then takes his genitalia in his hand like a hammer and uses it to beat on the second
man's forehead, as though he were a nail, until the first man reaches climax. This activity comes with the unspoken rule that the bros never make eye contact, lest the activity becomes homosexual in nature.