SACRAMENTO, Calif. (AP) _ Prosecutors said they had to drop a case against a man accused of trying to accost an 11-year-old girl because a judge wouldn't allow testimony about a slang term involving R. Kelly.

Tamiko Carter, 30, approached the girl last September while she was walking to school and asked her how old she was, prosecutors said. When she told him she was 11, Carter allegedly asked whether she had a boyfriend, ``then told her he was fixing to do an 'R. Kelly.'''

Carter allegedly pulled his car to the curb and opened the door, but the girl ran away.

Kelly, a singer from Chicago, has pleaded not guilty to 14 counts of child pornography in Cook County Circuit Court. The charges stem from a February 2002 videotape that allegedly showed Kelly and a 14-year-old performing numerous sex acts.

The prosecutor's office said Kelly's name is now listed in the ``Urban Dictionary'' as a verb that means to have sex with an underage girl.

Prosecutors had planned to present testimony from the 11-year-old girl and an expert witness who would testify that Carter was referring to that definition.

But Sacramento County Superior Court Judge Lloyd Phillips refused Thursday to allow the testimony, and the district attorney's office said it couldn't pursue the case without it.

Kelly, whose first name is Robert, won a Grammy for the gospel-like song ``I Believe I Can Fly.'' He's also known for sexually charged music such as ``Bump N' Grind'' and ``Ignition.''