The singer and musician Van Dyke Parks posted this on Twitter today:
Translation: In 1973, apparently Parks alerted Bonnie Raitt to the song “Wah She Go Do,” which was written by Calypso Rose and opens with the line “I can understand why a woman must have an outside man.” The song appeared on Raitt’s album, “Takin’ My Time,” with backup vocals by Parks. It apparently did well enough to earn Calypso Rose a royalty check in at least the four figures, by which she was understandably pleased.
Here’s the song.
notoneoffbritishisms.com 
“Chuffed” as an adjective is rare enough in American usage. “To Chuff” as a transitive verb is far less common than the adjective, even in British usage.