Sleepy Hahas Share definition Flag The uncontrollable laughter reached at the late hours of the night where everything seems funny. It's 3 a.m. and Claire finds everything amusing because she has the sleepy hahas. Sleepy Hahas by Sleepyhahas February 27, 2011 0 0 Get merch Get the Sleepy Hahas mug. Buy Now — $32.95 See more merch