To sing along with the music that plays in your car as you drive... Usually with no limits on the volume and little concern for intonation or pitch... It is best performed with equal energy and enthusiasm, regardless of vehicle's speed, or position of windows/convertible/moon roof top. Level of musical performance should not be influenced by the location or audible range of any other motorist(s) unless said motorist(s) are members of local law enforcement... !
"Thanx, Bro...! It took me a while to match my CARaoke levels with all of this aftermarket gear, but the groovin' helps with the cruisin' unless the cops are abusin'...!"
Trapped in the back seat of the station wagon with screaming children and a dog with gastro I realised things could have been worse as soon as the caraoke started.