From Longman Dictionary of Contemporary Englishtrip/roll off the tonguetrip/roll off the tongueinformalSAY if a name or phrase trips or rolls off your tongue, it is easy or pleasant to say Their names trip off the tongue very easily. → tongue
Examples from the Corpus
trip/roll off the tongue• Most have spent all their sentient life as paid-up devotees, and the glib phrases soon roll off the tongue.• A name which trips off the tongue. 