I love this on a hot afternoon with plenty of ice. I know it as a woo woo (possibly whoo whoo).

You'll need:

Peach schnapps
Vodka
Cranberry juice
Orange juice.

To make: (i'll give the qunatities for a highball glass, but you can scale up to a picher)

Two fingers peach schnapps
Two fingers vodka
add some ice and then top up 50/50 with cranberry juice and orange juice.

Drink and repeat till you fall over.

*Please note, two fingers means if you wrap two of your fingers around the bottom of a glass and pour in the booze till it reaches the top of your top finger

Ummm...
Not to be a party pooper, but this is properly called "Sex On The Beach."
It was a very popular drink in the 1980's.
Some ladies still order it.

Equal amounts of peach schnapps and vodka would make a very sweet drink.