joyride

Short definition from Wiktionary

Noun

1. 1
   A ride in a vehicle taken solely for pleasure or enjoyment, especially a vehicle ride taken with no particular goal or purpose and just for the pleasure or enjoyment of a vehicle ride.
2. 2
   An instance of driving a motor vehicle in a carefree or reckless manner, especially a vehicle which has been taken without the permission of the owner.
3. 3
   A very pleasant experience.

Verb

1. 1
   To take a joyride.