This meme is based on the well-known "Is this a pigeon?" format, where a character from an anime mistakenly identifies something unrelated. In this version, the image has been altered to show the character pointing at a large boot, with the word "YOU" placed above their head. The caption at the bottom reads, "IS THIS A LOLLIPOP?" The humor comes from the absurdity of someone mistaking a heavy boot for a lollipop, exaggerating the idea of being completely wrong about something obvious. The meme is typically used to mock situations where someone makes an incorrect or ridiculous assumption.
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