1 also sponge down [transitive]
to wash something with a wet cloth or sponge:
Clean the rug by sponging it gently.
She stood on the bathmat and sponged herself down.
2 [intransitive] informal
to get money, free meals etc from other people, without doing anything for them - used to show disapproval
These people are just sponging off the taxpayers.
3 [transitive always + adverb/preposition]
to remove liquid or a mark with a wet cloth or sponge
sponge something off (something)
I'll go and sponge this juice off my dress.
to put paint on a surface using a sponge
sponge something on (something)
Just sponge the paint on, like this.