A Sasuke Uchiha body pillow? A Suiseiseki dress? A pair of Super Mario underwear? A Pikachu thong with connected tail? A sex toy of Tony Tony Chopper? A blow up Alex Louis Armstrong? A fursuit with the ass missing?
Probably having Gal Gun 2 downloaded on my PS4. I don't really buy physical anime/game merch outside of the occasional t-shirt or smartphone case, but none of those have anything that I would call embarrassing.