E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Tout (pronounce towt).
To ply or seek for customers. A touter is one who touts. (From Tooting, where persons on their way to the court held at Epsom were pestered by touts.
A century or two ago, when the court took up its quarters at Epsom [many of] the inhabitants used to station themselves at the point where the roads fork off to Epsom by Tooting and Merton, and tout the travellers to pass through Tooting. It become a common expression for carriage-folk to say, The Toots are on us again.Walford: Greater London, vol. ii. p. 530.