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primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies
(noun) leech, parasite, sponger
a follower who hangs around a host (without benefit to the host) in hope of gain or advantage
(noun) quick study
someone able to acquire new knowledge and skills rapidly and easily
she soaks up foreign languages like a sponge
(verb) cadge, bum, grub, mooch
ask for and get free; be a parasite