Japanese Dog
Noun. To yank someone's collar or, preferably tie, violently back and forth while yelling "are you a Japanese dog?". This will no doubt cause them to snarl angrily, much like a Japanese dog would if you jerked their collar back and forth. Giving someone a Japanese dog is frequently considered a merse.
Marshall totally gave Christian a Japanese dog before his Spanish presentation. Christian had to stand in front of the whole class with his tie fucked up!
Japanese Devil Dog
When you're having sex with a girl in reverse cow girl position and then she gets up and shits on your dick. Then you cum on your own dick and she sucks it all off.
My wife wanted a japanese devil dog. I divorced her the next day.