big mac wack

When some has a fetish for masterbating to the sight of Big Macs or someone eating a Big Mac

Carson loves to big mac wack to Kyle eating McDonalds.

MAC-wack-it

a MAC owner who uses his laptop to masturbate to a variety of pictures and porn sites.

Hey, did you see that picture of Emma Stone? She is so hot, I had to MAC-wack-it before I went to work today.