Sekirov Dictionary

there's many a slip twixt cup and lip

UK /ðɛəz ˌmɛni‿ə ˈslɪp twɪkst ˌkʌp‿n̩ ˈlɪp/US /ðɛəɹz ˌmɛni‿ə ˈslɪp twɪkst ˌkʌp‿n̩ ˈlɪp/

saying1

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(old-fashioned) In any situation, however well planned, something can always go wrong.
- Many thynges fall betwene the cuppe and the mouth. — 1539

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