Homie Assisted Power Steering. While driving, you need your homie to grab the steering wheel for you in certain occasions. It's really easy to ask for help, just say HAPS yo.
A shorting of "happening", and used like the slang usage of "scene". This word dates back at least to the 1950s, e.g., it is used in the 1959 song, "Daddy Can I Go to the Hop?" by Eddie Jones and the Cashmeres.