(CNN) Slang can be hard across any generational gap.

Baby boomers may have been confused to hear about an "airhead" in the 1980s or getting "tight" in the 1990s.

A high school teacher matched his students' slang with more common phrases.

Just like those before them, today's Gen Z teens have their own way of communicating.

Now, one teacher isn't just taking notes on how to decipher it but also writing the definitions down.

James Callahan, a 43-year-old sociology teacher at Lowell High School in Massachusetts, decided to make a dictionary of all the slang words his students were using. His spreadsheet of terms went viral after one of his students shared it on Twitter.

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