The as-useless-as saying is a folk art form: one comparison, infinitely extendable, funnier the more specific it gets. A chocolate teapot is the classic; an inflatable dartboard is the connoisseur's choice; an ashtray on a motorbike is the poet's. The votes below sort years of reader submissions so the sharpest comparisons rise.
Use them on colleagues who contributed nothing, teammates who fed the enemy, and anyone whose help made everything worse.
The formula works because it is a tiny logic puzzle: name something that looks functional and is not. The best entries allow half a second of plausibility before the collapse — a screen door on a submarine passes inspection for exactly that long, and that half-second is the joke. Specificity beats profanity every time, and the votes on this page prove it.
These sayings suit the office, the group chat and the post-match debrief, and they double as self-deprecation when the useless party is you. When one comes flying at you instead, the comebacks collection is your reload, and the roast material next door escalates from there.