noun, noun which may take the genitive case particle 'no'
Used for spontaneous performance, speech, or action without preparation. Common in music, theater, and everyday conversation.
from Latin
His speech was completely ad-libbed.
Try playing the guitar off the cuff.
He changed his lines on the spot, ad-libbing.
The comedian often throws in ad libs on stage.
She's good at ad-libbing, so she's reliable even on live broadcasts.