Definitions for jaywalkˈdʒeɪˌwɔk
Random House Webster's College Dictionary
to cross a street heedlessly or at a place other than a regular crossing.
cross the road at a red light
To behave as a jaywalker; to violate pedestrian traffic regulations by crossing a street away from a designated crossing or to walk in the part of the street intended for cars rather than on the sidewalk.
Origin: Back-formation from jaywalker