Line uttered by Symboli Rudolf in Chapter 18 of Umamusume: Cinderella Gray.
The original scene features Rudolf saying the above line while making an intimidating expression with shaded eyes and one hand propped under her right cheek (ref., top left panel).
The above line and scene are frequently memed among the Japanese and Chinese Umamusume fanbase. Often, the last word will be swapped out, forming a "Don't look down on X" snowclone.
This tag automatically adds meme (learn more).