Combination of amused+disturbed. i.e., The state of being both amused and disturbed at the same time. Common among individuals with warped and/or crass senses of humor such as those who frequent /b/ or alt.tasteless.
My friend and I discussed all the things that cause weird colored poop earlier. It was gross but I couldn't stop laughing I was so amurbed.
by gnodab December 2, 2009
by FIds September 19, 2013