Noun. From Indonesian. (Part of my projectthreesixfive)
“A joke that is told so poorly that you cannot help but laugh at it”
Bear in mind that this isn’t the same as a pity laugh. This is a proper laugh, just because the joke teller gets it completely wrong or (I’m guessing) that the mood is so unusual after the joke that you end up laughing involuntarily.
It scares me to think that I can think of many jokes that can be classed as Jayujayus (this is the plural form of Jayus; interestingly, it reduplicates the stem rather than adding any suffix). And that is why I’m shutting up now.