coccyx

Following this evolutionary split, the group of apes that includes present-day humans evolved the formation of fewer tail vertebrae, giving rise to the coccyx, or tailbone.

Mr. Rafelson left home as a teenager and worked as a rodeo rider — he said he broke his coccyx after being thrown from a bull, which he mounted in a brash attempt to win $5 in a bet — and played in a band in Mexico.

Sitting in a north London park, a mile from where Rotten grew up, Boon reeled off a list of other injuries sustained over six months of filming: He fractured his coccyx when he fell over a drum kit; zealous singing dislocated his jaw; he spent several hours a day hunched over to emulate the musician’s posture, and still has back pain from it today.

Davidson had revealed that Kelly had bruised his coccyx after the two fell off the stage at "Saturday Night Live."

The "Bad Things" singer explained that his coccyx wasn't the only thing he hurt that night.