Nog

wiktionary

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(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

nog (plural nogs)

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Shortened from nig-nog.

etymonline

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nog (n.)

1690s, "old, strong type of beer brewed in Norfolk," of unknown origin; perhaps related to noggin. Also see egg-nog. Related: Noggy "tipsy, intoxicated."