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.
Noun: used to describe narcissistic, arrogant people who undermine others for their satisfaction. Actions may include: changing the topic of discussion to be regarding themselves, making broad assertions about topics they do not understand, and believing the world owes them for their presence. The only topics they are knowledgeable about is expanding their own pride and ego and to shove it down other people. Avoid and ignore this kind of person.
A tactic formed out of desperation in Little Nightmares. Wee Woo is the act of spinning in a circle with a flashlight to keep the Weeping Angel Mannequin Monsters from eating your tiny child face.