Cat on Hot Sand is a sword form. Aside from the name, nothing is known about the actual movement.
Rand al'Thor flowed through this form while attacking Trollocs after stealing back the Horn of Valere from Padan Fain. Gawyn Trakand moved through this form as Marlesh tried to use Hummingbird Kisses the Honeyrose during a bout involving Gawyn against Marlesh and Sleete. Gawyn also used this form against a Bloodknife who was trying to kill Egwene al'Vere.