(also "Freewheelin'"
1. Free of restraints or rules in organization, methods, or procedure. Heedless of consequences; carefree. Rambling, often aimlessly and without any kind of objective, either verbally, artistically or physically. Could have both positive and negative connotations.

2. Driving a family member, friend or acquaintance's car without permission. Technically auto theft, but the relationship to said car owner makes a legal charge highly unlikely. Often perpetrated by teenagers without a license or with only a permit.

Got the covid-19 vaccine

when one does not wear the proper under garment underneath the shirt... or none at all

To "coast" in a manual-transmission car without being in gear, i.e. with the clutch pedal depressed or with the shifter in neutral. Widely used on hills and such to save gas, since it keeps your revs at idle speed while still moving.

where a woman rides in a car with her tits exposed. there are several ways she can do this. She can stand up through a moon roof, ride in a convertible, in the back of a pickup truck ect.
Derives from tits being called wheels.