Another name for a booty call. Stands for Sex, Alcohol and Money(or marijuana) because thats the only time you see them is when you need one of those. Works especially well not to distinguish between a male or female individual around the opposite sex.
The drowsy, listless feeling endured after noshing on way too much food. Specifically, barbacoma often pertains to the episode following consumption of Chipotle burritos (perhaps filled with barbacoa), though it is applicable to large quantities of food in general.
After eating all that Chipotle, I do believe I've slipped into barbacoma and will be unable to accomplish anything for the foreseeable future. Two burritos are too many.