We found one dictionary that defines the word dropping by/in:

General (1 matching dictionary)

1. dropping by/in: Cambridge Advanced Learner's Dictionary

▸ Words similar to dropping by/in ▸ Usage examples for dropping by/in ▸ Idioms related to dropping by/in ▸ Wikipedia articles (New!) ▸ Words that often appear near dropping by/in ▸ Rhymes of dropping by/in ▸ Invented words related to dropping by/in