Simple past tense and past participle of slum.(verb)
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Use "slummed" in a sentence
"After driving the twisted residential streets of the planned community looking at condos that we might have been able to rent, we "slummed" it by spending an hour in the confines of the Princeville Hotel."
"The parents of the two kids who battled at Ballistyx and slummed it at Edgemont Manor were now going to see them perform on the biggest stage in music."
"Gone are the bohemians and artists that might have slummed it on the water in 1960s and 1970s."