Toot, v. i. [imp. & p. p. Tooted p. pr. & vb. n. Tooting.] To blow or sound a horn; to make similar noise by contact of the tongue with the root of the upper teeth at the beginning and end of the sound; also, to give forth such a sound, as a horn when blown. “A tooting horn.”
Tooting horns and rattling teams of mail coaches. --Thackeray.