Masterbit

But that there job with that French Count was my masterbit.

Source: wiktionary

The young man at once gave his address, and then his name, whereupon the stranger grasped his hand, and said, “That's the masterbit; I used to live next door to yer father, and I ha' nussed you many a time when you wor a nipper.”

Source: wiktionary

These Lisley ricks are, as we say in Oxon, a “masterbit” and as much superior to the average rick as a poem to a set of newspaper verses.

Source: wiktionary

And that title song, an impishly dashing waltz for four tenors, remains one of Styne's least appreciated masterbits, truly imaginative writing from this supposed pop tunesmith.

Source: wiktionary