The action of waking up in the morning going and hanging a slash and busting a phat ass fart whilst pissing
The other day i heard jimmy get up in the morning and bust a phat urinart, it was so loud i think he may have shat him self
Drawing a picture in freshly-fallen snow using urine
Man 1: "Wanna see my urinart?"
Man 2: "Ooh, a unicorn!"