Gullible is good IMO.
From http://www.learnersdictionary.com/definition/gullible: easily fooled or cheated, especially : quick to believe something that is not true. I'm not gullible enough to believe something that outrageous. They sell overpriced souvenirs to gullible tourists.
Credulous also fits, but from my experience/cultural-exposure, many people have told me they were (or someone else was) gullible, but I don't recall anyone describing someone as credulous. Strange.
Wikipedia has a comparison under gullibility:
- Gullibility is a failure of social intelligence in which a person is easily tricked or manipulated into an ill-advised course of action. It is closely related to credulity, which is the tendency to believe unlikely propositions that are unsupported by evidence.
There is also some comparison (and interesting discussion) of the terms in wikipedia's credulity though (IMO) the definitions given are not as precise as the various references suggest.
This ngram is interesting, showing that credulous has declined in the 20th century. This COCA report shows gullible is more common now.
There are many words, which emphasize different meaning. Some are negative.
Pleasure aspect of doing whatever you want: bon vivant, hedonist, pleasure seeker.
Going wherever you want, possibly new places (metaphorically too): globetrotter, explorer, pioneer.
Free thought, defiance: maverick, liberal, free thinker, nonconformist.
Disregard for traditional social structures: bohemian, hippie, beatnik.
Disregard for manner and social grace: boor, barbarian, brute, philistine.
Ambition: doer, achiever.
Disregard for law: criminal, outlaw, gangster, robber, lawbreaker, desperado, etc.
Acting in self-interest without regard for trust: back-stabber, snitch, cheater, two-timer.
Acting in self-interest without regard for others: egoist, narcissist.
Best Answer
Nouns:
Grafter. 1, 2 (def. 2 in both cases). Someone who engages in and benefits from graft, which is the abuse of one's position of (often political) power or authority for the purpose of gaining money by illegal or immoral means. It would not be appropriate to call a filing clerk who copied and sold classified papers a grafter.
Money-grubber. 1, 2. Someone who's solely or overly interested in money and will take almost any opportunity to acquire more. The term focuses more on the desire for money than the willingness to do anything to get it, though someone money grubbing would be willing to do many things (but not necessarily anything) others aren't in order to get paid.
I do know of a word that fits exactly what you're after, but it's extremely rude and vulgar. See below if you're interested.
Adjectives: