He took a 'ghoulish' [='sinister'] delight in their troubles.
the 'ghoulishness' of his laughter
a 'ghoulish' [='fiendish'] laugh
(..) Playing with magnets? Just magnets. I'm gonna put snowboarding. We'll put snowboarding. I don't really snowboard. - All right, what are some of your likes? - Uh, ghouls. Son of a bitch. What are you talking about now? You know, funny little green ghouls, go- What? - What, like in movies and cartoons? What are you- - Little green ghouls, buddy. Don't write ghouls! I'm not. I'm putting travel. - Jesus Christ! What are your dislikes? - People's knees. Come on! Come on! You gotta be kidding. (..)2009 TvShow: It's Always Sunny in Philadelphia Title: The Waitress Is Getting Married Season: 5 Episode 5