throw your weight behind (someone/something)

to use your influence to support someone or something.

A number of top performers have thrown their weight behind a live concert to fight hunger around the world.

• put the arm on someone
• put the ball in court
• put the ball in someone's court
• put the bite on
• put the bite on someone
• put the boot in
• put the brakes on
• put the brakes on someone
• put the brakes on something
• put the cart before the horse
• put the cat among the pigeons
• put the clock back
• put the fear of God into
• put the fear of God into someone
• put the finger on
• put the finger on someone
• Put the flags out!
• put the genie back in the bottle
• put the heat on
• put the heat on someone
• put their heads together
• put the kibosh on
• put the kibosh on something
• put the knife in
• put the lid on