godan verb (-ru), intransitive verb
demonstrate; protest; take part in a demonstration
Casual verb derived from デモ (demonstration). Used for participating in street protests or rallies.
昨日、駅前で学生たちがデモっていた。
Yesterday, students were demonstrating in front of the station.
彼はよくデモる
He often takes part in demonstrations, so the police know his face.