sponge

primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework

a follower who hangs around a host (without benefit to the host) in hope of gain or advantage

someone able to acquire new knowledge and skills rapidly and easily

a porous mass of interlacing fibers that forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used

gather sponges, in the ocean

wipe with a sponge, so as to clean or moisten

soak up with a sponge

erase with a sponge

ask for and get free