tit•tupPronunciation: (tit'up), [key]
—n., v., -tuped, -tup•ing or (esp. Brit.) -tupped, -tup•ping.
an exaggerated prancing, bouncing movement or manner of moving.
to move, esp. to walk, in an exaggerated prancing or bouncing way, as a spirited horse.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.