IPA: //ˈslʌmər//
KK: /ˈslʌmər/
A person who visits or spends time in impoverished areas, often for entertainment or social reasons.
During her travels, she met a slummer who enjoyed exploring the less affluent parts of the city.
Slummer → The word 'slummer' originates from the Old English 'slumrian', meaning to slumber or sleep. It refers to a person who is in a state of slumber or sleep.
Think of someone who is 'slumbering' — that's why 'slummer' refers to a person who is sleeping.