half seas over

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half seas over

Drunk; intoxicated. The phrase likely alludes to the staggering gait of one who is drunk. Primarily heard in UK. Boy, you were really half seas over last night—how hungover do you feel this morning?
See also: half, over, sea

half seas over

fairly drunk. British informal , dated
The expression originally meant literally ‘halfway across the sea’, hence implying a condition halfway between sobriety and drunkenness.
See also: half, over, sea