To be bent over while dancing provocatively. One dance partner must approach the other from behind and bend them at the waist while continually performing a gyrating motion with their hips. Victims of bacci are usually held in this position for extended periods of dance and suffer eventual loss of dignity.
"That girl got baccied so hard last night."
"I baccied her for the entire song."
"I just want to be baccied at the club tonight!"