A Fly in the Ointment — Meaning, Usage & Examples

What it means...

One small problem that spoils something good.

The plan is fine and one small detail is out of place, so the phrase is a gentle way to flag a blocker.

It comes from Ecclesiastes, where dead flies spoil the perfumer's ointment.

Use it when…

When one detail spoils an otherwise good plan
When a small problem blocks something ready to go
When you flag a single issue, not the whole idea

Don’t confuse with...

"A Thorn in Your Side"

—

A person or problem that annoys you constantly

"A Storm in a Teacup"

—

A lot of fuss about something not important

"A Fly in the Ointment"

—

One small problem that spoils an otherwise good thing

Where you’ll hear it

You’ll hear the "A Fly in the Ointment" idiom in real life — at work, in relationships, or in the media.

Work & Business

Office Conversations

A project lead calls the missing approval the fly in the ointment.

Relationships & Social Life

Friends

A friend says the only fly in the ointment on the trip was the weather.

Media & Everyday Life

News

A report calls one clause the fly in the ointment of the whole agreement.

‹›

Use it like this

Here’s how to use "A Fly in the Ointment" idiom naturally in real conversations, with real examples.

Work & Business

Meetings

Colleague

Anything stopping us from starting?

You

One fly in the ointment — the contract isn't signed.

Relationships

Casual Chats

Friend

How was the vacation?

You

Lovely, with one fly in the ointment: the flight home.

Everyday Conversations

Raising Concerns

You

There's a fly in the ointment we should fix first.

Manager

Tell me — I'd rather hear it now.

‹›

Last updated:

October 4, 2026

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