yirly Share definition Flag A slimy version of saying yuh and/or a term used sort of like an adlib to flex your slime appeal. Used only by mfs wit the most rizz. “Aye u tryna rip” “Yuh gang gang yirly” yirly by slimeygoththighs May 11, 2022 0 0 Get merch Get the yirly mug. Buy Now — $32.95 See more merch