1. smelling bad or unpleasant; stinking
Usage: informal; chiefly British

1. present participle of niff; to smell bad or emit a foul odor
Usage: informal; chiefly British

Examples

• The gym locker room was absolutely niffing after practice.
• That old cheese is niffing—we should throw it away.
• The niffing smell coming from the drain made everyone leave the bathroom.
• His socks were so niffing that we made him wash them immediately.
• The garbage bin started niffing in the summer heat.