wahoo

What the picture shows

A grey cat with a neutral, slightly smug expression wears an orange pumpkin-shaped hat with a jack-o'-lantern face and green stem, its front paws raised on either side of its head against a plain white background. Chatters would likely use this to convey a playful, festive, or celebratory mood, often as a reaction to something amusing or exciting.

No measured meaning yet. Used 52 times in 4 channels this month; one is written once chat gives enough evidence.