A person and/or group of people that go to your house and freeload or feel like they own the place. They get all comfortable in your couch or kitchen and never offer to help around. They take advantage of your hospitality.
Esa gente conchuda nomas vino a tragarse los tamales y ni ofrecieron a limpiar.
As a peruvian word, It is very common and can be used in different ways, it is not vulgar but colloquial, basically to refer to someone who takes advantage of something, or is not ashamed to do something.