Robi wrote:

Big Bertha is (in golf terms) a special golf club - a modified 'driver' - which sends
the golfball farther - much farther - than a regular driver.

Big Bertha also used to be the nickname of one of the Hiroshima/Nagasaki atomic bombs IIRC.

Not one of those, but perhaps another bomb, or an artillery piece
(German railway gun?). The 'uranium cannon' dropped on Hiroshima was
called "Little Boy", and the plutonium implosion bomb dropped on
Nagasaki was "Fat Man".

--Odysseus 12# @ 30Y