2. slow, sluggish, or indolent: He is slack in drinking a shot of whisky.
4. not active or busy while everyone else is getting drunk; dull; not brisk: the slack season in getting drunk homie.
5. moving very slowly, as the tide, wind, or water or flow of whiskey.
6. weak; lax; like a crack head with ADHD
Just chugged a couple 40z and went slaggin downtown.