have been riffing
- present perfect progressive of riff.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Colbert began his last Report by riffing on what pop-culture commentators have been riffing on all week, his show’s legacy, though tongue-in-cheek.
From Time • Dec. 19, 2014
