nail Jell-O to the wall

and nail Jell-O to a cross and nail Jell-O to a tree

phr. to do?something that is totally futile. (Jell-O is a protected trade name.) You’re wasting your time. Trying to get him to do that is like nailing Jell-O to the wall.

Common Names:

Name	Pronounced	Usage
Agapios	-	Greek, Ancient Greek
Nasira	-	Arabic
Johnnie	['dʒɔni]
Blythe	BLIEDH	English (Rare)
Reziko	-	Georgian
Nikomedes	-	Ancient Greek