No idea, but...
If you take the 'hang loose' and the 'devil horns' and do both at one (index, pinkie, and thumb extended) that is American Sign Language for "I love you."
The 'devil sign' is also used in Texas as 'Hook 'em Horns' for American football fans, but with the palm out instead of palm in for the Devil sign.
As many know, the 'Peace Sign' in the USA is similar to the 'Up Yours' sign in the UK (or the V for victory). Peace sign is also palm forward, V for Victory is palm inwards.
I used to use the old American sign for "OK" until I got to Brazil. There I was told it was the sign of an arsehole.
I believe the American sign for 'F You' is universal, eh?
Do the V sign palms in here and you'll get thumped lol. V for victory is palms out.
The 'up yours' sign is usually started with the palm up horizontal then brought up with palm facing you, can be done as many times as you feel the person on the receiving end deserves.
V for victory
'UP yours' though he actually means Foxtrot Oscar.