Slush

2 small cans frozen orange juice concentrate
1 small can frozen lemonade concentrate
1 large can pineapple  juice (Originally this was Hi-C Orange-Pineapple, but that is hard to find)
2 cups of unsweetened tea
2-1/2 cups of whiskey

Mix all ingredients and place in freezer.  It takes quite awhile to freeze so make it several days in advance.

Remove from freezer and use a large spoon to scrape the frozen surface.  Use shavings to fill a glass 1/2 to 2/3 full.  Fill rest of glass with 7-Up.  Stir and serve. 

The good news is when the brain freeze hits, you'll be to intoxicated to notice much.