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The term "Mug Up" was used in coastal communities by the mid-1800s to describe any snack or coffee break throughout the day or evening.

“Mug ups" were an important part of life for fishermen. They would gather and have a hearty meal and warm up whenever they could take a break. Today, this nautical expression still describes a gathering of people for a drink and meal

Today, Mug-up is used by Scouts Canada to describe an evening snack (after dinner, but before Campfire). It is usually soup or hot chocolate and something to munch on (grilled cheese, etc).
We'll meet for a mug-up with the boys when we reach harbour.
Mug-Up by That Graham Guy September 26, 2011
Word of the Day on January 1, 2025
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Usually morning coffee break. Still used on the waterfront in New England fishing towns particularly Gloucester, MA. Term was used in the movie Captains Corageous ( 1925, Spenser Tracy ) to add local flavor to this movie about the hard life of the Gloucester fishermen.
coffee break Mug-up
Mug-up by FFbob August 31, 2012
Related Words
to get coffee. The caffiene equivalent of "smoke 'em if you got 'em"
We'll be driving straight through, so now's your last chance to mug up.
mug up by mandingoh May 5, 2005
Showing your face/how you look “mug” also relates to “mug shot”.
Person A: that story you posted of yourself on instagram is readable.

Person B: girl mug up then ho.
Mug up by Serinity&Leelyn June 6, 2024
Mug up is the phrase shouted by an English Pornographer moments before the lead actor reaches Billy Mill Roundabout, this ensuring the actor(s)/actress(es) arecorrectly positioned to catch the “Money Shot” on their Boat Race.

Sometimes, should the budget of the skin flick allow it, there will be a special role dedicated to this task. That person is known as Sarson, as they are specifically watching for the Vinegar Strokes.
Mug Up Jeremy, Quentin’s just reached his Vinegar Strokes.
Mug up by Mr.Bite.MyLip January 2, 2025
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