(aka biddysurfing) is when a young
person (usually around 9-15) runs up behind an old person and jumps on his or her back, the momentum of the run-up causing the oldie to move forward
a few steps before falling to the floor. The craze, though possibly
not the words gitsurfing
or biddysurfing, is thought
to have originated in Manchester in the mid-1990s
to be slowly growing in popularity.