from
The Collaborative International Dictionary of English v.0.48
Toot \Toot\, v. i. [imp. & p. p. {Tooted}; p. pr. & vb. n.
{Tooting}.] [Cf. D. toeten to blow a horn, G. tuten, Sw.
tuta, Dan. tude; probably of imitative origin.]
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." --Howell.
[1913 Webster]
Tooting horns and rattling teams of mail coaches.
--Thackeray.
[1913 Webster]