The phrase itself is common internet slang, with IDK standing for I do not know and TBH standing for to be honest, and the combined form is used online as a quick, self-aware way to admit uncertainty without sounding defensive. Short reaction clips like this one circulate on soundboards and in short-form video edits, where a single spoken line can carry a whole joke. Its staying power comes from that flexibility: the same few words work for genuine confusion, playful avoidance and dry self-deprecation, depending on the clip placed before it.