ruin / spoil

Also see: TEASE

RUIN / SPOIL:
This sign means spoil in the sense of "spoiled milk."
The right "X" handshape is placed on top of the left "X" handshape (both "X" handshapes with the knuckle pointing forward rather than upward. The left hand doesn't move. The right hand slides forward and then pivots up. The movement is somewhat like a kid popping a wheelie on a bicycle.

RUIN: (side view)

If you mean spoiled as in "spoiled child" use the sign PET with an exaggerated movement and a dissapproving facial expression."

TEASE:
The sign "TEASE" uses a double movement.
The right "X" handshape is placed on top of the left "X" handshape (both "X" handshapes with the knuckle pointing forward rather than upward. The left hand doesn't move. The right hand slides forward twice.
Here is a side version of the sign TEASE: Notice how in his picture it is good natured teasing. (See the facial expression).