OK
In the 1840s telegraph communications via Morse code became a reality on th east coast of the United States. Telegraphers strove to use shortcuts in messages which would clarify the messages and complete them more quickly. To this day a letter k _._ or "dah dit dah" in morse code is transmitted at the end of each completed message, which is a question asking "have you got that ok?". The receiver then transmits an r ._. or "dit dah dit" in response which means, message received ok. The telegraphers paraphrased the k and r to "ok" and "roger" which both remain in the common parlance today. Although other more esoteric origins of "ok" exist, they were not in the common parlance at the time that telegraphers, train conductors and engineers popularized their use in the 1840s. The term spread to England and Continental Europe (even non-english speaking countries)as telegraphy spread to them. The principal of establishing a "handshake" in communication in this way (utilizing complimentary status bits regarding segments of messages)is used to this day in advanced digital communication devices.
The Urban Dictionary Mug

Got it as expected. I love how UrbanDictionary store kept in contact with me as the order progressed. Thanks for a great experience and I look forward to getting more mugs LIKE this.
Loved it!
My 4th cup purchase just love them
He loved the mug!
The cup is very nicely designed
Got as a gift for a friend and he loved it and thought it was really funny. Great quality and very strong feeling build.
Great mug. Super customer service!
Love their products. Have bought numerous mugs. Buy 'em.
If you buy these mugs. You are a giga chad
They managed to squeeze the (edited down) definition onto the side of the mug in its entirety, so no complaints! Was worried it was going to cut off in the middle of a word or something.
The definition really makes it
Very prompt order fulfillment, and all the messaging was perfect!! Looks great! Thank you!
THIS MUG IS AMAZING!!
Love my mug! Everything looks perfect.
Just wonderful thanks
I am so thrilled that I found a mug with the exact sentiments I was looking for. This will be great in the future for birthday and xmas gifts.
I Like This Mug because im thicc and therefor this mug is thicc
Ok These mugs are really easy presents for the people you love i would find the best example of them and then buy and mug and give it to them as a present So simple
This mug is perfect! High quality product
My Aiden mug is awesome
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