lowdown adjective 3noun 2adverb 1forms 3 adjective3 •Unfair; scoundrelly; shameful. •seedy, sketchy, disreputable •(slang) down low; purporting to be heterosexual while engaged in sex with men. noun2 •inside information, the story or truth.All the reporters hoped to be the first to get the lowdown on the celebrity's marriage plans.here's the lowdown •A lowlife, a despicable person. adverb1 •Unfairly; dishonourably; in a deceitful or mean manner.“I say, that’s playing it a bit low down,” I protested. — 1920 formslowdowns · more lowdown · most lowdown