T.CaSIA Share definition Flag A person who treats their students very well and have 100+ assistants. Most of them are females. They often wear glasses . Student 1: OMG is that T.CaSIA? Person 1:Yep thats a T.CaSIA. T.CaSIA by And I Opp- November 25, 2021 0 0 Get merch Get the T.CaSIA mug. Buy Now — $32.95 See more merch