teenbernation Share definition Flag The act of a teen sleeping in as late as possible until forced to wake up by a parent or guardian. Teenbernation strikes 9 in 10 teens, causing grumpy mornings and groggy afternoons. teenbernation by Tojorisin February 27, 2012 0 0 Get merch Get the teenbernation mug. Buy Now — $32.95 See more merch