1. A way to express hyper positive emotion and/or excitement without needing to increase volume; instead of yelling or screaming "YES!!!",
one can merely say "yesh" in a normal volume or even quietly. See yas, YES, YES,
yay but not
yeet.
2. (mathematics) abbreviation for the hyperbolic yes function.
1. A: "Dude, you just won the lottery!"
B: "Yesh."
2. D(yesh(n),n) = {
wesh(n) where 0<n<100, else FUCK.YES(n)}