Persons who can't resist the open road and often take off on random unplanned road trips, looting and pillaging.
Persons who travel around the country in a van and practice freeganism and perhaps some shoplifting in order to stick it to "the man"
"Check out the skull and cross bones those land pirates painted on their van."
"I just saw a land pirate stick a bottle of Jack Daniels down her pants,walk out of the store and jump in the back of that van."
Will have no respect for the law and will happily fight with the old bill when they try to make some sort of dent in their criminal activities. Likely to crash your car that they've just stolen when the police try and stop them and they floor it.
You: wanna get raped?
Stranger: No how old are you 9?
You: it's a joke you dirty Land Pirate!!
Note: not an actual conversation