mac out

mack out

To improve the performance or appearance of something by customizing it with new components or decorations. A noun or pronoun can be used between "mack" and "out." I bought a car for less than $2,000, then macked it out with speakers, new tires, and a sick paint job. The company urges people to bring in their old, beat-up computers and let their team of engineers mack out the old machines, rather than throw them away and buy brand new ones.
See also: mack, out

mac out

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.
See also: mac, out