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Fool of a Took. Throw yourself in next time, and rid us of your stupidity.
— Gandalf ‧ The Lord of the Rings: The Fellowship of the Ring

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker's scolding escalates from calling someone foolish to a harsh suggestion that their disappearance would remove their stupidity. The exaggeration makes the anger unmistakable. Read as an insult, the line presents an extreme verbal dismissal rather than a measured assessment of the person addressed.
Context reviewed