Flip Flop Sheet

flip flop
A light sandal, typically of plastic or rubber, with a thong between the big and second toe
a backless sandal held to the foot by a thong between the big toe and the second toe
A backward handspring
interchange: reverse (a direction, attitude, or course of action)
reversal: a decision to reverse an earlier decision
An abrupt reversal of policy

sheet
come down as if in sheets; "The rain was sheeting down during the monsoon"
cover with a sheet, as if by wrapping; "sheet the body"
Make a sail more or less taut
Extend a sail by tightening the sheets so that the sail is set as flat as possible
any broad thin expanse or surface; "a sheet of ice"