This meme is currently spreading like wildfire throughout reddit posts, and subreddits. It came from a reddit post by Bamka, where, in summary, a man tried to cut a bus off in an intersection, and as he honked furiously the bus driver "an African American individual" muttered to himself "Bitch…I'm a bus." before continuing right on through the intersection. The original image macro (tagged as the KYM page image) was created by Redditor TinyJ316.

Facebook Page: http://www.facebook.com/pages/Bitch-Im-a-bus/127063750695194?v=wall

Reddit Subreddit: https://www.reddit.com/r/BitchImABus

Store: http://www.helpinstyle.com/bitch-im-a-bus-t-shirts

Original Post: https://www.reddit.com/r/reddit.com/comments/fd667/while_riding_the_bus_yesterday_an_inside_joke_was/

"So I was riding home from class on the bus through the mall parking lot. At my mall, there is an exit where the incoming cars have no stop signs, but the cars exiting the mall do. As you may have heard, there is a hefty bit of snow happening around the midwest, so stopping a bus in this mess is a tinge difficult. Anyway, We were rounding that corner coming out of the mall when a little sedan comes zooming up, trying to whip into the mall. The bus, already midturn, obviously isn't going to stop for this dick. The guy honks, and I'm sitting towards the front where I hear the bus driver(an African American individual) mutter to himself 'Bitch… I'm a bus.' and keeps driving. I laughed out loud, unable to contain myself.
Now, whenever I want to say I just don't give a fuck, instead I proudly exclaim 'Bitch…I'm a bus.'"