Food, almost exclusively of the vegetarian, vegan, and healthful variety, which is bland, tasteless, and visually unappealing. Otherwise good food can become co-slop because it is cooked in too large a quantity or incorrectly seasoned. Co-op slop is frequently the product of inexperienced, untalented hippy chefs cooking for the other residents of a co-op or commune.
Jimmy grabs a burger on his way to chill at the commune because he don't dig the co-op slop they eat there.
I found this fantastic recipe for stir fried tofu and mustard greens but I fouled it up and it tastes like co-op slop!