what are these things called?

[Shawn]

example *i just made this pic about and 1hr ago lol*

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other example

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[shadedcrow]

they look kind of like ferrets?

 

[Mephistopheles]

demotivational pictures if I remember correctly.

 

[uzumakikenshin]

funny banners.. LOL

 

[Rihari]

lol lyk the chuck norris 1

 

[Schmack]

demotivational posters.

 

[Mugiwara]

It's an Internet Meme.
There are under categories for memes, for example demotivational posts and motivational posts.

The picture with the ferret is just a meme. No category that I know of.

Then we have LOLcats.
Example:
Lolcat

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Motivational poster:

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Demotivational poster:

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And so on.
If you're 18 years old, you can check out 4chan. Even if you are 18 years old, viewers discretion is advised.

 

[gamahiro]

they look kind of like ferrets?