Definition of "piece de resistance" [piece de resistance]

• A masterpiece; the most memorable accomplishment of one’s career or lifetime. (noun)

Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License

• "The piece de resistance was a large green baize bag, which gave forth, as the old man restlessly lifted it from side to side, a charming jingle, as of innumerable golden guineas,"
• "But Sam Lasko still had his piece de resistance to offer."