sponge
n//spʌnd͡ʒ//tvättsvamp, svamp, snylta, parasitera, tatta
(countable) A piece of porous material used for washing (originally made from the invertebrates, now often made of plastic).
(slang) A person who takes advantage of the generosity of others (abstractly imagined to absorb or soak up the money or efforts of others like a sponge).
(intransitive, slang) To take advantage of the kindness of others.