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sponge (something) off (of) (someone or something)
To beg for, borrow, or obtain something (usually money or food) as a handout from someone or something else. My brother's been sponging money off my parents ever since he dropped out of college. My roommate's nice, but she's always sponging food off of me, and I don't have the heart to tell her to stop.
mod. thirsty. I gotta get a drink, man. I’m sponged!
See also: sponge