Floor it!

[Odessa Dawn]

If I want someone to speed (he is driving a car), can I say floor it?
floor it - Idioms - by the Free Dictionary, Thesaurus and Encyclopedia.

 

[SoothingDave]

Yes. Or to use a little rhyme "put the pedal to the metal."

 

[Tdol]

You could also tell him to put his foot down in BrE.

 

[Barb_D]

Of course, you might also have to say "Don't worry - I'll pay for your speeding ticket if you get one."

 

[MikeNewYork]

You could also tell him to put his foot down in BrE.

Do you also use that phrase the other way?

put foot down - Idioms - by the Free Dictionary, Thesaurus and Encyclopedia.

 

[Rover_KE]

We certainly do.