I had a remotely similar story ... I was playing round robin doubles at the club ... Sets to 4 and then you switch partners with another court.
Anywho, this odd little guy is going to be my partner. When he comes up to me and we have the following discussion:
Him: High my name is Bob, but everyone calls me ninja
Me: My name is Dizzl, and I will not be calling you ninja, Bob
HIm: Um, Ok but if you want me to poach just say "lets go ninja" and I will know you want me to be sneaky up there.
Me: I guess you will not be poaching then, Bob.
"You should be playing linebacker, not singles."