Comprehensive resource for understanding and mastering English idioms
The idiom "sponger, sponging, sponge off" refers to someone who is taking advantage of others by using them for personal gain without contributing anything in return. It can also mean someone who is inactive or lazy and relies on others to do everything for them. The idiom implies that the sponge is drawing resources from its surroundings without giving back anything.
The idiom "sponger, sponging, sponge off" dates back to at least the 16th century. The first known use of the term "sponge" in this context was recorded in a collection of proverbs in 1578. Over time, the idiom has taken on different meanings and connotations. In some contexts, it can be used as a more general insult for someone who is lazy or unproductive.