phrasespeed off speed off to leave somewhere quickly or suddenly - used especially about cars or other vehicles: She watched them as they sped off into the night.
speed off
To leave or depart very quickly or hastily, especially by driving. The criminals sped off just before the police arrived.He sped off when he heard the teachers approaching.
speed off
v.
To leave or drive off rapidly: She hopped in her car and sped off. The ambulance sped off to the hospital.