like trying to nail Jell-O to a cross

like trying to nail Jell-O to a cross

Incredibly difficult or impossible, such that it could be seen as a foolish or worthless endeavor to attempt. (Jell-O is a trademark for a brand of gelatin-based desserts that have a soft, gelatinous texture.) Trying to have a reasonable debate with her father is like trying to nail Jell-O to a cross. If they can't secure a victory here today, climbing back to a spot in the tournament finals will be like trying to nail Jell-O to a cross.
See also: cross, like, nail, trying
Farlex Dictionary of Idioms.
See also:
  • like nailing Jell-O to a cross
  • like nailing Jell-O to a tree
  • like nailing jelly to the wall
  • like trying to nail Jell-O to a tree
  • foist
  • foist (someone something) (up)on (one)
  • (as) worthless as tits on a boar (hog)
  • be no good
  • rattlebones
  • rattle-bones