Inserting a thumb into someones anus while also putting the middle finger of the same hand into their vagina thereby resulting in being able to lift the person up and carrying them around like a sixpack.
Boozer the beer lover was thirsty for a brewski while fingering a horny honey but didn't want to ruin the mood so used the sixpack butt attack technique on her and went to the kitchen to got a cold one.
Sixpackable is a way to describe how much you like a beer. Do you like it enough to buy a six pack? Hoppy, smooth, and refreshing are great ways to describe a beer. But it's Sixpackable or not says it all! Sixpackable is always capitalized.