A job that pays low wages. A job where you can barely keep food on the tableusually worked at by low class people who can't obtain the skills to get any better.
Eating a big meaty burger and getting head at the same time. Usually preferred by employees of large scale burger chains who then use empty burger buns to wipe off the 'excess' leading to the 'mayo myth'.
"Oh man, that was a tough shift but at least I got a McJob at the end of it though!"