Who knew shaking your booty could be so dangerous?

A Winnipeg woman has been sentenced to one year in jail after a bar dance contest sparked a drunken melee in which another woman suffer a serious slash wound to her wrist.

Tiffany Willis, 21, pleaded guilty to one count of aggravated assault.

"This type of behavior cannot be tolerated," said Crown attorney Mitchell Lavitt. "An insult to somebody's dancing should not end up in fisticuffs."

The incident occurred as Willis was celebrating her 20th birthday at MyBar on Regent Avenue in July 2009.

Court heard another woman lashed out at one of Willis's male friends after her performance in a "booty shake" contest earned a round of boos and cat-calls.

Willis was about to hit the woman with a thick plastic drinking cup when a female security staffer came between them, landing in the line of fire. Willis broke the cup over the woman's arm, slicing a deep gash in her wrist area.

"There was quite a large amount of bleeding," Lavitt said.

According to a victim impact statement, the woman was off work for nine months and has still not regained full use of her hand. She said she has suffered great embarrassment because people see her scar and assume she attempted suicide.

Willis was drinking heavily that night and has only a hazy recollection of events, said defence lawyer Mike Walker.

A bar employee described Willis as a regular and told police "she does have a big mouth but this is the first time anything like this has ever happened," Walker said.

Willis apologized for her "thoughtless acts and over-drinking."

Judge Ted Lismer sentenced the woman to an additional three years supervised probation and ordered that she write a letter of apology to the victim.