The sound of a bullwhip is a "crack," or possibly a "snap," but there does not seem to be a separate sound for the impact of a lash.
The sound of a whip is usually described as a crack."The whip artist cracked his whip and the small tube of paper protruding from his pretty assistant's mouth was sliced in two!"(See Related links below)
The sound effect for the "crack of a whip" is sometimes "whoo-PAH!"
whoop
The whip, contrary to popular belief the "crack" the whip makes is not the sound of the whip hitting itself, it is a sonic boom.
The cracking noise is the tip of the whip breaking the sound barrier
The Slap Stick
rowr!
A bullwhip works like an extension of a human hand to speed the thinner-half of the whip and then rapidly change the direction of movement. When the change occurs, the tip of the whip actually breaks the sound barrier and makes the crack! of the whip.
Varooooom
The "crack" occurs when the wave of motion traveling down a whip surpasses the speed of sound. The wave can move so quickly because a whip tapers from the handle to the tip. When a whip is snapped, the momentum from the motion at the handle is conserved, and consequently the speed increases as the diameter of the whip decreases. Thus the wave gathers speed as it continues down the length of the whip, and when its velocity exceeds the speed of sound it produces a small sonic boom-the distinctive "crack". Dawie Venter
Ka-ching!
The sound a rooster makes is typically spelled as "cock-a-doodle-doo."