Well I did a bit of Scottish Step Dance when I was 10 - 15 years younger - I was semi-old even then! And that foot crossing over step was referred to as the "Broken Ankles" step.
In this video: you get the "broken ankles" step coming in at 2.00: it involves transferring weight from one foot to the other while bending the knees!
https://www.youtube.com/watch?v=4AP_i9v1wyk&list=RD4AP_i9v1wyk&t=214