this is not a euphemism for brests. It is a testement to how much the man saying it wants more land because he lives in a swamp.
FATHER: Stop that, stop that! You're not going to do a song while
I'm here. Now listen lad, in twenty minutes you're getting married to
a girl whose father owns the biggest tracts of open land in Britain.
HERBERT: But I don't want land.
FATHER: Listen, Alex,--
FATHER: Herbert. We live in a bloody swamp. We need all the land we
HERBERT: But I don't like her.
FATHER: Don't like her?! What's wrong with her? She's beautiful,
she's rich, she's got huge... tracts of land.