To mess up. To embarrass yourself.
I wanted to join my local football team but I was afraid I would shat it.
an amalgamation of the words 'Shit' and 'Chat'
when someone says something terrible or generic a reply can simply be one word:
"Shat"
usually shouted at the top of ones voice
a word that is subsituted for the word shit
opps a shat my pants i need new ones