1.) Any German warship built between the mid 1920s and late 1930s.
2.) A reference to an extremely squat yet powerfully stacked individual. A short fat person or someone who is wider than they are tall. Can also be an individual who works out excessively so they look too built for their size.
Webbo: Fuck me, did you see that bird walk past then - she was a fridge!
Baggers: yeah, she was a proper pocket battleship.