blep /blɛp/noun 1verb 1forms 3 noun1 •(Internet) The act of extending the tongue beyond the lips without opening the mouth fully.We found out why cats do this and collated some of our favorite blep moments. — 2015 verb1 •(Internet) To extend the tongue beyond the lips, seemingly for no reason, without opening the mouth fully.You know what blepping is, right? It’s when an animal’s tongue casually pokes out of their mouth and stays there. It’s very cute, but quite odd. — 2018 formsblepped · blepping · bleps