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
RenÁTa	RE-nah-taw (Hungarian)	Hungarian, Czech, Slovak
Inocencio	ee-no-THEN-thyo (Spanish), ee-no-SEN-syo (Latin American Spanish)	Spanish
Lev (1)	LYEF	Russian
Timour	-	History
Nevan	NEV-an	Irish
Elizabeth	i-LIZ-ə-bəth (English)	English, Biblical