A convention using a 2♦ opening bid to show a hand of minimal opening bid strength (11-15 high card points) with exactly four spades and five (or sometimes six) hearts.
Origin
Reduced Anglicized form of Irish Ó Flannabhra ("descendant of Flannabhra"), a personal name derived from flann + abhra. The bridge convention was invented by American player William (Bill) L. Flannery.
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