The term "Amanda Turnbull" is used in common sense to refer to the sex position otherwise known as the butterfly. The Amanda Turnbull is the most dreamt of, exotic position that everyone should give a go. At the end of your night, you will be screaming "OH yahh"
"Can we try the Amanda Turnbull tonight baby?"
"That Amanda Turnbull made me cry out for my mommy"
"Amanda Turnbull was the most fierce thing I have ever tried"