Thunderchicken Share definition Flag US Marine Corps slang for the vertical take-off and landing aircraft V-22 Osprey "Yeah, we had to jump into a hot AO... did it out the ass of a thunderchicken... bitchin." Thunderchicken by Cajun Scientist June 21, 2009 0 0 Get merch Get the Thunderchicken mug. Buy Now — $32.95 See more merch