scurrilous

scur·ri·lous

adj.

1. Given to the use of vulgar, coarse, or abusive language; foul-mouthed.

2. Expressed in vulgar, coarse, and abusive language.

Making or spreading scandalous claims about someone with the intention of damaging their reputation

Mayawati was clearly under the illusion that Julian Assange was an inventor of scurrilous gossip rather than merely a purveyor of it, and therefore erroneously deemed him fit to be an inmate of the asylum in Agra.