USA, 1966—a (13th-birthday) party held for a dog—a blend of ‘bark’ (the sharp explosive cry of a dog), and of ‘bar mitzvah’ (the coming-of-age ceremony for a 13-year-old Jewish boy), or ‘bat mitzvah’ (the equivalent ceremony for a Jewish girl)
USA, 1992 (1981?)—adjective: primarily but not strictly vegetarian—noun: a person who follows a primarily but not strictly vegetarian diet—a blend of ‘flexible’ and ‘vegetarian’
a word with two opposite or contradictory meanings—coined by Jack Herring in 1962—Joseph T. Shipley had developed the same notion in Playing With Words (1960); he called it ‘autantonym’
USA, 2009—a party given for a man who is about to become a father, attended by men only—‘dadchelor’: a blend of ‘dad’ (i.e., ‘father’) and of ‘bachelor’ in ‘bachelor party’ (a party given for a man who is about to get married, attended by men only)
USA, 1901—wonderfully stylish, elegant or fashionable—a blend of ‘swell’ and ‘elegant’—popularised by its use in the song Well, Did You Evah!, interpreted by Bing Crosby and Frank Sinatra in the 1956 film High Society
UK, 1877—humorous: a holiday or period of leisure spent drinking alcoholic liquor—blend of the nouns ‘alcohol’ and ‘holiday’—has, in the course of time, been coined on separate occasions by various persons, independently from one another
USA, 1999—unfashionable or socially awkward in a way regarded as appealing or endearing—blend of ‘adorable’ and ‘dork’—the noun ‘dork’ denotes an odd, socially awkward, unstylish person
USA, 1943—nonsensical or absurd talk or ideas concerning global issues—blend of ‘global’ and ‘baloney’—coined by Clare Boothe Luce in her maiden speech to the House of Representatives
USA, 1992—to reduce staff numbers to levels so low that work can no longer be carried out effectively—portmanteau, coined by the Trends Research Institute, combining the adjective ‘dumb’, meaning ‘stupid’, and the verb ‘downsize’