gloop /ɡluːp/verb 2noun 1forms 3 verb2 •To flow like goo or goop, to move in a slushy way. •To cover someone in gloop or goo. noun1 •(informal) Any gooey, viscous substance.And when it comes to mochi, the Japanese rice dough, much of its appeal can be attributed to a glorious bounce or a gelatinous squish or a comforting kind of gloop. — 2016 formsglooped · glooping · gloops