Archaic or informal British usage meaning ‘odd’ or ‘peculiar’.
Определения
Odd, strange, or slightly peculiar, sometimes with a hint of disreputability. It was a rum business, but everything worked out in the end.
(dated, chiefly British) Excellent; fine; first-rate. We had a rum time at the fair.
Containing, flavoured with, or relating to rum (used attributively). We enjoyed a slice of rum cake after dinner.