Slang consists of a lexicon of non-standard words and phrases in a given language. Use of these words and phrases is typically associated with the subversion of a standard variety (such as Standard English) and is likely to be interpreted by listeners as implying particular attitudes on the part of the speaker.
One caveat with D-mannose is that it is only effective with UTIs caused by E. coli infection. While this accounts for about 90% of cases, there are 10% that will not benefit from this treatment. In this case, supplements that help disrupt biofilms can be useful in treating and preventing UTIs.
Mannose has been found linked to good urinary tract health. In the absence of mannose, UTIs tend to develop quickly. Because the sugar is rapidly absorbed into the blood and expelled naturally though urine, several doses of mannose though out the day are found to be better than a single large dose.