The 'Tell ISIS' meme features a photograph of an elderly woman holding a white poster board with a stern but determined expression. The template gained viral traction as a way to juxtapose the image of a harmless grandmother with humorous messages directed at the militant group. It is most commonly used to portray grandmothers as the ultimate secret weapon, threatening the group with things like 'no dessert' or 'cleaning their rooms.' The meme thrives on the 'don't mess with grandma' trope, turning a simple photo into a versatile canvas for internet humor and satirical defiance.