Utterly intoxicated (usually drunk). When speaker is shithoused, word can be used as virtually every form of speech.

Getting home from a long night of drinking only to have your parents waiting at home to give you shit when you get back.

English Slang:

Used to describe a cowardly or unpleasant person.

When one consumes a few too many alcoholic beverages.

shit·house
ˈSHitˌhous/
noun: vulgar slang
1. A toilet.
2. A messy place, like an outdoor toilet.
3. Description of a person who is drunk to the point of being a complete mess.

Some thing that has gone wrong
say it instead in shit
sounds better

What really drunk people confuse with "shitfaced".