[yldstrk]

Some idiot dictionaries may claim it has a positive connotation, but it really doesn’t. Same with “notorious” there is no positive connotation to this word, but some ignoramuses use it that way. “Notorious” means well known for bad stuff not famous.

[xzins]

This is what Merriam-Webster says. Note the #2 meaning. Do you consider Merriam-Webster an "idiot" dictionary? Definition of GRANDIOSE 1: characterized by affectation of grandeur or splendor or by absurd exaggeration 2: impressive because of uncommon largeness, scope, effect, or grandeur — gran·di·ose·ly adverb — gran·di·ose·ness noun — gran·di·os·i·ty \ˌgran-dē-ˈä-sə-tē\ noun