Putting your index and middle fingers into a woman's vagina and then twiddling them back and forth like you are stringing a guitar.
Yeah I gave Becca the Guitar Hero last night, she couldn't stay still!
Fingering a chick with your index and middle fingers and then twiddling them back and forth like you are stringing a guitar.
Tim totally gave Becca the guitar hero last night, she was squealin'
Sexual Position: Verb: You do the reach around from behind, strumming the vaginal area, while finger twiddling the breasts.
Mary: WOW! Rick really laid the guitar hero on me last night.
Susan: Yeah he must be in expert mode.