when a person is trying all night to get with a girl, and as he pops to the toilet some smooth talker jumps in and takes her home, he would then be a lunch cutter...can also be used for people who are cheating with your other half
yo dude i been workin on her all nyt, u jus totally cut my lunch, u lunch cutter!!
A topshit mother fuker who thinks he has the right to move in on other peoples women. He thinks the world revolves around him and he has the right to go anyone elses lunch. This cunt usually get bashed several times a year and deserves it everytime.