tit·tup 
(tĭtəp)
(tĭtəp)intr.v. tit·tuped, tit·tup·ing, tit·tups or tit·tupped or tit·tup·ping
To move in a lively, capering manner; prance.
n.
A lively, capering manner of moving or walking; a prance.
[Perhaps imitative of the sound of a horse's hooves.]