The phrase "dropt a bundle" is a colloquial way of saying "lost a lot of money". The spelling may appear incorrect to some, but it is actually intentional as it is written in a dialectic form. The use of "dropt" instead of "dropped" and the omission of the letter "p" in "bundle" is reflective of the pronunciation in certain regional accents. In IPA phonetic transcription, the word would be pronounced as /drɒpt ə ˈbʌndl/.