The thrusting motion created when providing anal sex to another party. The term derives from a veterinarian providing a domesticated animal a rectal examination.
John: Hey man, when I went into your room yesterday, I saw you doing the Pet Detective on Emily.
James: Yeah. It's all in the arms.
James: Yeah. It's all in the arms.
by Civics February 12, 2012
by skinnygangster September 5, 2006