Entry 1 sense Webster, 1913 Sobriquet /(sō̇`brē̇`kā̇")/ · So·bri·quet · IPA /ˈsoʊ.bɹɪ.keɪ/ 01 n. An assumed name; a fanciful epithet or appellation; a nickname. 1. An assumed name; a fanciful epithet or appellation; a nickname.