ostrobogulous UK /ˌɒs.tɹəʊˈbɒɡ.jʊ.ləs/US /ˌɑs.tɹəˈbɑɡ.jə.ləs/ adjective1 •(humorous) Slightly risqué or indecent; bizarre, interesting, or unusual.A tissue of ostrobogulous lies, he calls them. — 1982 formsmore ostrobogulous · most ostrobogulous