Wikipedia on the Horns…
Posted on July 3rd, 2010 by Jeff Hoy…the sign eventually came to signify, variously, that the one gesturing is rocking him or herself, is encouraging the recipient of the gesture to rock as well, that he/she emphatically appreciates the rocking that may have already commenced, or at the time others may have already commenced the rocking while in a large crowd or [...]
