You know who you are
1 lime sliced as thin as your patience will allow
1-2 tablespoons of sugar (superfine, ideally but NOT powdered!)
1.5 oz. cachaça (a/k/a "1st press rum", if you can't find these, use regular white rum--it will taste a little different--and then this drink becomes a caipirissima)
1/2 cup cracked ice
Place the lime and sugar in the bottom of a glass. Using the handle of a wooden spoon, crush and mash the limes into as fine a pulp as you can stand (you want to release not just the juice, but also the essential oils from the peel), making sure you have no visible bits of sugar left. Pour the liquor and ice. Stir well. Decorate a double old fashioned glass with a slice of lime. Basically, this is a limeade made with liquor instead of water.
REMEMBER...the acidity of the lime reallllllllllllllllllly masks the taste of the alcohol, so take it easy, Carmen Miranda.
-Joke

Comments
And I knew how to make one, pretty much (it's a mojito without the mint and soda and with cachaca instead, right?) but thank you anyway. Especially for the you-know-what. Wink, wink!
Er, I didn't mean that to sound dirty.
Okay, I did, but only a little.