For a number of years, Robinson and comedian Jerry Minor had a comedy act where they performed as musical duo L. Witherspoon & Chucky, with Minor as smooth singing L. Witherspoon and Robinson as Chucky, the keyboard player and back-up singer. They performed the act on HBO's Sketch Pad, several stand-up shows on Comedy Central, Real Time with Bill Maher, and Jimmy Kimmel Live! He occasionally performs with his band, The Nasty Delicious, alongside his brother Chris Rob. They were featured as his band in an episode of The Office, and on the season finale of the seventh season of Last Comic Standing. He has also performed in character in multiple episodes of The Office, and was featured on the Hot Tub Time Machine soundtrack, singing "Jessie's Girl" and "Let's Get It Started." He was also in the film Miss March, playing the role of the hit rapper Phil, also known as Horsedick.MPEG. Robinson produced two songs from that same film.