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EtymologyEmphatic form of lug (“large man”).edit
Nounbig lug (plural big lugs)
1.(colloquial) A term of affection and endearment describing a man whose personality traits reflect the opposite of his overall broad physique. For example, a man may be tall, physically built but isn't afraid to express his overall feelings and emotions. In other words, a big lug is a man that acts the opposite of what his overall image reflects, or acts against the stereotypical image of the tough guy.
Big bad John gave his wife flowers. The big lug.