It wasn't long ago that the words "meme" and "election" were seldom uttered together. But in the age of Twitter, Tumblr, and everything in between, political gaffes and campaign zingers are created and passed around with lightning speed, so 2012's campaign has seen more social media action than any before.

Of course, the internet is a vast place stuffed with endless content and a variety of hilarious riffs on Barack Obama, Mitt Romney, Paul Ryan, and Joe Biden's best moments, so there’s no way to capture them all. But as we finally reach Election Day tomorrow, here's a look at the 2012 campaign's most memorable memes.