The salesman humbugs his elderly customers into buying unnecessary warranties.

Despite repeated warnings from friends, his humbugability caused him to fall for the elaborate online scam.

Despite his sharp wit, his optimism made him worryingly humbugable around smooth-talking salesmen.

Many townspeople quickly tired of his humbugism and refused to support his schemes.

When the committee announced another pointless rule, he muttered, 'bah humbug,' and went to make himself a cup of tea.