A funny picture of an adorable toddler in a Joker costume has become a meme, and we've collected our 20 favorite Joker Kid image macros here.

Grumpy Cat was introduced to Reddit on Sunday, and she's already won over our hearts with her cuddly curmudgeonliness. We've collected our favorite Grumpy Cat pictures here.

The Scumbag Radio DJ meme appeared last month to catalog our many complaints about this insufferable staple of an obsolete format. We've collected our favorite pictures here.

The Overly Attached Girlfriend may have creeped us out all summer, but it turns out she may have been a Misunderstood Girlfriend after all.

The 'Office Thoughts' meme lists all of our workday thoughts while we wish we were somewhere other than an office on a weekday morning.

Philosophical Puppy started asking questions this week, and our minds have already been blown. We've collected our favorite pictures here.

The One-Up America meme emerged this week after the Mars landing stole London's Olympic thunder. These colors don't run, hoss!

Hip Grandpa killed Nazis back in the day, and now he's pwning you on Xbox. Now we've collected the 20 best examples of the Hip Grandpa meme.

Last week we had '1990s Problems'. This week we have '1890s Problems' to remind us that things could have been much, much worse.