That's wild is a phrase that could be used when fed up with someones bullshit. In a sense that's wild means fuck you

lil mad is like big mad but the opposite, you mad but not mad to the extent of pullin somthin

if u got a sorority big with the pledge name that's wild then you are a lucky gal!
that's wild is kind of like deadass in the way they can be said in a lot of situations. That's wild is a word used for emphasis.

Another way of saying that's crazy. but with more emphasis.

That's wild means fuck you