nail Jell-O to a tree

English

Verb

(US, slang, rare) To do something that is impossible or very difficult, with connotations of pointlessness.
They are asking us to nail Jell-O to a tree if they insist on having everything done in three days.

Usage notes

Also used in the common variant to a wall, and with jello in place of Jell-O. British form uses jelly instead. Particularly used in the form like nailing jello to a wall.

Synonyms

See Thesaurus: difficult

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