Schadenfreude

An emotional reaction defined as taking pleasure in another’s misfortune.

Reference:
Van Dijk, W. W., Goslinga, S., & Ouwerkerk, J. W. (2008). Impact of responsibility for a misfortune on schadenfreude and sympathy: Further evidence. The Journal of Social Psychology, 148(5), 631-636. doi: 10.1037/1528-3542.6.1.156