like nailing jelly to a tree


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like nailing jelly to a tree

Incredibly difficult or impossible, such that it could be seen as a foolish or worthless endeavor to attempt. Trying to have a reasonable debate with her father is like nailing jelly to the tree.
See also: jelly, like, nail, to, tree
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.