There was discussion back in 2019 in the comments of Jeff Kaufman's blog [1] about this, when the term "robin" was being suggested about this. Some there suggested that the term "Mad Robin" could be replaced with "sashay" or "full sashay" from MWSD. Apparently "full sashay" was used until the 1950s, meaning the same motion as a Mad Robin, but is not used today, although "half sashay" still is. I can't vouch for the accuracy of that discussion though, since I haven't danced MWSD, and I certainly wasn't dancing in the 1950s.
Gabrielle Taylor
She/Her
Massachusetts