smarn't

A sneaky way of calling someone stupid

"So lemme demonstrate, I found a better way to tie my shoes, first you make a knot, and then you make a knot, and then you make a knot, and then you make a knot, and then you make a knot, and then you make a knot, and then you make a knot, and then you make a knot, aren't I a genius?".

"Yeah that's pretty smarn't man, nice,"

"Thanks man!"