tallyho

Etymology
1772, UK, probably alteration of, from , , from , , (second half of 13th century), composed of  +. More at.

Interjection

 * 1)  Used to urge on a fox hunt, especially when the fox is sighted.
 * ''There he is! Coming out of that coppice! Tallyho tallyho tallyho!
 * 1) A simple greeting, primarily used by the upper classes.
 * Tallyho, chaps! What's the time, anybody?
 * 1)  Target sighted.
 * (Air Traffic Control): Speedbird 123, New York, traffic at two o’clock, seven miles, a Boeing 737, west-bound, at 4000 feet.”
 * (Pilot): New York, Speedbird 123, tallyho.

Usage notes
In aviation radio usage, typically abbreviated to. In civilian aviation usage, the official term for “traffic sighted” is “traffic in sight”.

Noun

 * 1) An instance of the interjection.
 * Alright, I'll give them the old tallyho.
 * 1)  A pleasure coach.

Verb

 * 1) To articulate the interjection.
 * I'll tallyho once we've got to the top.