"Cover Them Up, Slut" is a redraw trend based on an image of a shirtless man with large pectoral muscles, paired with the aforementioned rude comment -- implying that the commenter either considers his large pecs to be as salacious as breasts, and/or is accusing him of being a mere thot.

Accordingly, the redrawn character is usually a fursona, or a Furry heartthrob, known or suspected to be a horny himbo.

Cover Them Up, Slut - Know Your Meme