The Combination of RUM & SLURPEE.
Certain combinations are better, exotic flavored rum, such as cocoanut or mango tend to go well with blue raspberry or cherry, while vanilla rum or plain white rum goes well with Coke. Spiced rum is a harder mix, but still works well.
Related- SLUMPED: being SLUMPEE drunk.
"Hey, (FRIEND 2)"
"yeah, (FRIEND 1)"
"Let's head to the (local convenience store) and make some SLUMPEES!"
"Awesome dude, we're gonna get so SLUMPED"