Adjective: Extemporaneous (ek-stem-puh-RAY-nee-us)
Definition:
1. Composed, performed, or uttered on the spur of the moment: impromptu
2. Provided, made, or put to use as an expedient: makeshift
Sample sentence: A group of revelers at the pub broke into an extempraneous rendition of “When Irish Eyes Are Smiling.”
