Lewis & Short

1. blaesus, a, um, adj., = βλαισός, lisping, stammering, hesitating in utterance, speaking indistinctly (most freq. in poetry): blaesus, cui litterae sibilantes (s, z) molestae sunt vitioseque pronunciantur, Popm. Differ. p. 133; Ov. A. A. 3, 294; Mart. 10, 65, 10.
Of a parrot: sonus, Ov. Am. 2, 6, 24.
Hence, subst.: blaesus, i, m., one who lisps, Dig. 21, 1, 10.
Of intoxicated persons, Juv. 15, 48; cf. Ov. A. A. 1, 598.