From Wiktionary, the free dictionary
sauce up (third-person singular simple present sauces up, present participle saucing up, simple past and past participle sauced up)
- To add sauce to; to serve sauce onto.
- (slang) To get drunk. (Can we add an example for this sense?)
Guess I was sauced up and accidentally sold a few bottles to Julian.
- (informal, transitive) To make something more saucy (sexually provocative); to sex up.