"Scrounge off" refers to the act of obtaining something without paying for it or without working for it. There are several synonyms that can be used to describe this behavior, including mooch, freeloader, sponge, leech, beggar, and parasite. Additionally, individuals who scrounge off of others may be described as opportunistic, selfish, lazy, or irresponsible. It is important to note that scrounging off of others is generally frowned upon and can damage both personal relationships and one's reputation in the long run. Ultimately, it is important to be responsible for one's own actions and not rely on others to provide for oneself without contributing in some way.