Korean hammer
When a guy penetrates a girl really hard while singing any song by SHINee, BIGBANG, or SNSD.
Guy 1: "Hey man, you sound really hoarse! What's up with your voice?"
Guy 2: "Yeah dude, I gave my girlfriend a Korean hammer last night! I didn't know I could sing that well!"
Guy 2: "Yeah dude, I gave my girlfriend a Korean hammer last night! I didn't know I could sing that well!"