S1E14 - What is this reverse 🖖 hand signal Riker does?

In S1E14, at the beginning Riker is walking along side Yarr and Worf who are departing to play a game when Riker says “The pride of the Enterprise goes with you!” and the. Gives a reverse 🖖 hand signal. Anyone know what it means?

(Tried attaching a photo but it won’t let me for some reason)