I cannot think of one can you?

Fish racing

I have always found the 'Thrill of the Chase' very exciting.

ive always wondered why pregnant women spit a lot, so why not make it a sport?.. line up a dozen and see who could spit the most/highest/furthest/farthest ...errm whats the difference between furthest and farthest?

no need to invent the perfect sport, crickets already been invented

Synchronised granny rolling. All you need is some oldsters and a big hill.

I used to enjoy throwing marbles at geriatrics!!! lol

Chewing the fat

Gurn rolling.

Potting the pint is a particular favorite of mine.

Arranging fiddlesticks.

Hurling (your dinner up)

Ice Volley Shot

Volleyball played on ice by midgets with 12lb shotputs.

Stinkfinger.

I've only thought of the name so far. Rules to follow.