Are traits and flaws a thing in Pathfinder?

[SangoProduction]

As the title says.

[IcarusWulfe]

Traits, yes don't know about flaws though.

[Red Fel]

Traits are very much a thing (http://www.d20pfsrd.com/traits).

[Necroticplague]

Traits: Yes. They're these little free half-feats. Default limit is two. Most are fairly restricted (i.e, +1 or +2 to situational effect), but some can have drastic effects.
Flaws: Not quiet. However, there are Drawbacks. These are negative traits you can take in exchange for letting you get another positive trait. Some are a bit questionable as to whether they're actually negative (i.e "animals refuse to come close to you").

[Troacctid]

Yes. Traits have already been linked. Flaws are known as drawbacks (http://www.d20pfsrd.com/traits/drawbacks) and they give you an additional trait.

[Hogsy]

As the title says.

Traits are a very big thing in Pathfinder, and while some can be quite situational (http://www.d20pfsrd.com/traits/regional-traits/child-of-the-crusades-regional-mendev), others can be as powerful (http://www.d20pfsrd.com/traits/magic-traits/magical-lineage) as feats, without the cost.

Drawbacks are what you would call flaws, but they grant an additional trait instead of an additional feat, and there is also a thing called Major Drawbacks, which are the flaws we're all familiar with, albeit they're 3rd party content. Some drawbacks are weird, while others don't seem all that negative to me. I personally allow flaws in my games as major drawbacks because the selection is quite small.