What's this hand signal?

[cropduster]

While watching a local girls playoff game an official that was clearly mechanically sound used a signal to one of the other officials that used the pinky and thumb (only) extended with a rocking motion of the hand up and down. I asked a seasoned ref that was there if he new what it meant and he didn't. Anyone here? We were speculating that it might have been and invitation for after ther game drinks or...