to head out, to leave (very colloquial)
to eat a lot and with joy (very colloquial)
to have a strong effect (for alcohol and drugs)
to punch someone in the face ("jemandem eine reinhauen")
"hauen" is overlooked by textbooks and course, but if you want to speak colloquial German. Today, we'll learn all about it and its cool prefix versions.
hauen, reinhauen, abhauen, umhauen