1. Offensive slang for a homeless person; often paired with 'dirty' (ex. "you dirty nomad").
2. One who does not have a place within society, a group of friends, sports team etc... and as such, is prone to stealing, begging and imposing themselves in inappropriate places.
"Look at all the dirty nomads in the shelter"
"Why should I give that dirty nomad money, he's just going to spend it all on drugs and alcohol"
"Taylor is such a nomad, no one wants him here at all"