is 'schlump' even a word?

I read The Book Thief by Markus Zusak yesterday, along with Prince of Time, so today I'm going to work on the previously mentioned stack of library books. I've always been an immensely balanced person. Ha. Ha. Hee. Ho. Hum. 

I've been in a pretty bad shlump for the past month and a half, in which I couldn't get excited about any of my writing ideas, and none of the pieces seemed to come together. Hopefully my brain has gotten over its little funk. 

Also, what the heck am I doing listening to a Christmas carol?