ad-lib

ad-lib [ædˈlɪb]

vb -libs, -libbing, -libbed

to improvise and deliver without preparation (a speech, musical performance, etc.)

adj (ad lib when predicative)

improvised; impromptu

adv ad lib

1. without restraint; freely

2. (Music / Classical Music) Music short for ad libitum

 n, an improvised performance, often humorous

[short for Latin ad libitum, literally: according to pleasure]

ad-libber  n

 

-  Sometimes, being in an ad-lib situation is the best way.

-  Every time he got me out of trouble with a brilliant ad-lib.

-  He is rather disjointed when he ad-libs.