The sign for "tough" uses "bent-V"
hands. The dominant hand moves downward and past the non-dominant
Note: In my example above it appears that I'm moving my non-dominant hand.
I "am" moving it but it is more of a reflex than an intended movement.
You don't actually have to move the "non-dominant" hand to do this sign.
The non-dominant hand can stay stationary.
You can also use the left "S" hand for the sign for "tough." The
dominant hand strikes a glancing blow off of the top of the palm-down