1 definition by JustASeal0
A domer is an original Tweet that was thought up off the dome. It originated from MLB Twitter by users in order to claim that a Tweet was original. Common GIFs associated with domers are Doug Dimmadome saying "I am Doug Dimmadome, owner of the Dimsdale Dimmadome", and recently, a GIF showcasing making contact against the camera with the user's head to signify a Tweet being a domer.
by JustASeal0 June 8, 2020