Bateson Share definition Flag Verb - to leave a large party or gathering unexpectedly and without word, presumably to avoid having your friends try to change your mind. I was so wasted last night that I had to bateson. Sorry, fellas. Bateson by PeeeJaay October 19, 2011 0 0 Get merch Get the Bateson mug. Buy Now — $32.95 See more merch