Mixed with some Take That!; in Becky Prim, Ello has a Big Bang Theory calendar, and Becky riffs on the show for having "overblown and unrealistic nerd stereotypes".
Dofus: Kerub's Bazaar: In episode 34, when Joris gets stuck in a magic box, one of Kerub's tentatives to guess the magic word that open it is "Bazinga!"
Family Guy: At one point in "Business Guy", Peter makes Carter throw a viewing party for an episode of The Big Bang Theory.