Spanish Backhand
Having a wank with ones right leg cocked at an angle such that your right arm can reach underneath to grip the penis with the knuckles facing upward.
I had a top spanish backhand last night.
Spanish double-backhander shasty
A squatting position when one has both arms stretched around the back of the thighs, thumbs facing the person performing the S-D-B shasty.
The boys saw a great looking girl on the beach, he quickly reached down and performed a public Spanish double-backhander shasty.