The rimshot behind badum tss comes from live comedy, where drummers in vaudeville and later stand up clubs played a snare and cymbal sting to underline a punchline. Written out as ba dum tss, the name imitates the three hits themselves. As clips moved online the sting became a standalone meme sound, shared on soundboards and dropped into edits whenever a joke needed acknowledging. Its old fashioned stage feel contrasts with modern videos, and that contrast keeps it in regular use today.