A term used mostly by the Dolan twins and fans as a short form for tissue
Ethan: Get me a tish
Grayson: Get this man a tish
The term fans of the Dolan twins use to tell people what twin they think is the hottest, smartest, funniest and overall they favorite!
Fan 1: you like the Dolan twins? which lane are you in?
Fan 2: Totally Ethans
Fan 1: WHAT!? Grayson is sooooo much better
Fan 2: How could you even think that