Clawfoot bathtub

From IFWiki

During IFComp 2019, Stian commented, "So far, I’ve played three games from this year’s IFComp that mention clawfoot bathtubs. Is this a new trend?"[1]

The IF Community later began using the phrase "clawfoot bathtub" to mean an element that, by coincidence, appears in multiple IFComp games in the same year.[2][3]

Partial list of clawfoot bathtubs by year