A drop in a bucket

[Tdol]

You can get the definition of this idiom here.

[aliaa]

I think that the choices no. 2 & 3 are similar in meaning

[blueabell2go]

In the UK we often say "a drop in the ocean" for the same thing.

[BobK]

Originally Posted by blueabell2go

In the UK we often say "a drop in the ocean" for the same thing.

Hmm. I feel that meaning's more along the lines of the second option, which is is why I voted for the first.

b

[BobK]

As I never use the 'bucket' variant, I assumed it must have a different meaning from the 'ocean' one. Just as well I never use it