Knuckles the Echidna is one of the core heroes of Sega's Sonic the Hedgehog franchise, known for his strength, short temper, and deadpan honesty. Short voice lines like this one circulate as reaction sounds because his gruff delivery makes even a simple shrug feel dramatic. The 'IDK' phrasing fits the clipped, texting-era humor of meme edits and livestreams, where a one-word dodge lands harder than an explanation. Its under-two-second length keeps it endlessly reusable as a button at the end of a joke.