We found one dictionary that defines the word look after number one:

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1. look after number one: Idioms

▸ Words similar to look after number one ▸ Usage examples for look after number one ▸ Idioms related to look after number one ▸ Wikipedia articles (New!) ▸ Words that often appear near look after number one ▸ Rhymes of look after number one ▸ Invented words related to look after number one