An alchoholic drink, usually hard alchohol such as vodka, whiskey, or rum. Referenced in the film "Dumb and Dumber"
"You boys been boozin'? Choking down on Grandpa's cough syrup, eh?"
by smik dog April 9, 2007
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Grandpa's old cough syrup usually refers to a hot toddy. A drink made with one shot of whiskey, a half cup of boiling water, a spoonful of honey, and a splash of lemon juice. Variations include adding cloves and/or cinnamon sticks then letting the drink brew for approximately 5 minutes before serving.

The nickname of Grandpa's old cough syrup comes from the hot toddy being used as a cold/flu remedy.
You guys been doing a little bit of boozing? Sucking back on grandpa's old cough syrup?
by ztpruit December 11, 2010
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