It’s the sign language alphabet spelling out the WWG1WGA.
However, the W is missing from the beginning word - it spells here instead of Where. It should have started with the 3 fingers up and apart, and the pinky and thumb touching/down.
Many years ago, I learned this alphabet - and used to be able to run through it fairly quickly—but have forgotten a few of letters. Remembered enough to decipher it.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Curious.