[1925–30; stink + -o]This word is first recorded in the period 1925–30. Other words that entered Englishat around the same time include: Nazi, buildup, decibel, distinctive feature, runout-o is a suffix occurring as the final element in informal shortenings of nouns (ammo; combo; condo; limo; promo); -o also forms nouns, usually derogatory, for persons or things exemplifying or associatedwith that specified by the base noun or adjective (cheapo; pinko; sicko; weirdo; wino)