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It’s like a big tide of jam coming towards us, but jam made out of old women.
— Father Dougal · Father Ted

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker compares an approaching mass to a tide of jam, then complicates the image by saying the jam consists of old women. The unexpected second detail makes an already unusual comparison stranger. Its comic effect comes from combining a crowd, a flood and a sticky food.
Context reviewed