2 cans frozen limeade concentrate
2 cans vodka (buy the cheap kind, you won't taste it)
2 liter bottle of Fresca
Dump the limeade concentrate and vodka into a big pitcher (one that can go into a freezer).
Add Fresca to taste, probably around 1/2 to 2/3 of the bottle.
Freeze for at least 3 hours.
Pairs Well With
I went to a Cookie Lee party with some girlfriends and had, what was called at the time, "limeade slushy drinks." I made them for our Dallas Cowboys game watching party the next day and another girlfriend informed me that they are called "bullfrogs".