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Very drunk, lugholes meaning ears so of course drunk up to the ears, literally!

Expression common in South Wales
You shoulda seen Owen last night, he was hardly able to speak he was so drunk ......... he was standing by the bar, slugged up to his lugholes with a big bag of fish!

I always get slugged up to the lugholes on a Friday night!
by llanellirog September 21, 2005
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