On the March 24 broadcast of 'Knowing Brothers', the members of the program proved they're still having a hard time keeping up with the fast-changing, new words that exist in society today.

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During the show, Lee Soo Geun asked Kang Ho Dong if he knew what the abbreviation "D.M." means while they were on the topic of SNS. Kang Ho Dong acted as if he was aware of the term and said, "I learned it very hard, why would I let you guys know so easily?" Hearing this, Song Ji Hyo and Min Kyung Hoon also both struggled to guess and continued to come up with excuses why they can't reveal what it means.

Numerous wild guesses were thrown in, everything from, "Direct Musso" to "Direct uMbrella". After finding out what it actually meant, Kang Ho Dong said, "We didn't know what it meant 5 seconds ago but we know now! We're all the same, it's direct messenger!" The rest of the cast members corrected him by saying, "It's direct message...we literally told you 1 second ago," creating laughter within the studio.

Can you relate to the three stars?