n. a sudden and desperate need for a Big Mac sandwich, a product of the McDonald’s restaurant chain. (Big Mac is a protected trade name of McDonald’s.) I feel a Big Mac attack coming on!
in. to overeat, especially the type of food served at McDonald’s fast-food restaurants. (see also blimp out, pig out, pork out, scarf out.) I’ve been in Europe for a month, and I just want to get home and mac out.