Talk about a crappy train ride.

A woman was attacked with a sock filled with feces on Chicago transit last week.

The 21-year-old told the Pioneer Press the man boarded the train at the same time she did, and attacked her at the next stop.

"He had a sock full of his poop on me," she told the paper. "It was everywhere -- on my face, my hair, my clothes."

Her attacker got off the train and ran, she said. Police searched for him nearby but couldn't locate him.

The Chicago Transit Authority has given cops images of a "person of interest" from its high-definition security cameras.

The woman said it would've been less degrading if she'd just been hit.

"The worst part is nobody had anything to wipe my face with," she said in the report. She found some newspapers before paramedics arrived with towels and water.

The woman said her attacker didn't utter a word and she has no clue why she was picked.