is a suffix that can be added to the end of any word, but usually added to the end of words that express emotion. It merely adds a more friendly and silly presence to the word and is not to be used in any formal situation.
***Usually, there is NO hyphen between the word and -sauce, but for the purposes of Urban Dictionary it had to be added to submit the entry.
See "crazysauce" in Urban Dictionary.
That was sweet-sauce!! (sweet)
I'm feeling quite blah-sauce :( . (blah)
That movie was scary-sauce! (scary)
I just had surgery and I'm feeling icky-sauce. (icky)