look up any word, like blumpkin:
 
1.
1. To diminish or reduce in value.
2. To render into a crap-like state.
3. To cover or fill with crap.
I hope those scissor-monkeys over at Spiffy-Cuts don't encrappen my hair.

The recent spate of mortgage defaults is encrappening the credit markets.
by Alan, the guy with the thing. December 06, 2007
 
2.
To make something crap, or crapper than it previously was.
Alice: hey, did you hear that faceborg has launched a commenting plugin?

Bob: yeah, now all the fuckwits I went to high-school with can encrappen my stream with their banal comments about crap they watch on TV.
by I am faceborg March 02, 2011