The unbeatable card[1] in Top Trumps. There's no way anyone can beat the Boeing B-52 Stratocruiser, because there is not an aircraft designer in history who would be foolish enough to try to fit nine engines on a plane - these days, four is considered profligate - and unlike with the top Trumps supercars edition there is no magnificent flying machine equipped with one wankel engine to “queer the pitch”.

See also

  1. Known in poker as “the nuts” - when you know based on the cards on the table that your hand can’t be beaten.