fair bra Tanya

Mondegreen of "fair Britannia",, the personification of the British Empire and Commonwealth of Nations.

The land of the Beaver shall forever remain loyal to the breasts of "firm bra Tanya" or fair bra Tanya.

From The Maple Leaf Forever:

In Days of yore,
From Britain's shore
Wolfe the dauntless hero came
And planted firm Britannia's flag...