Yeetsir Share definition Flag A word that describes itself, a mixture of yessir and Yeet, used when it’s litty as a titty. “ hey bro, you down to crack some cold ones and get some girls” “ yeetsir my dude” Yeetsir by Kpike May 17, 2019 0 0 Get merch Get the Yeetsir mug. Buy Now — $32.95 See more merch