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Photo: Frank Seravalli, Daily News

Catchphrase! Get your catchphrase!

Frank Seravalli of the Daily News discovered this t-shirt, which will be worn by the Flyers under their uniforms. The shirt, 16 Knock Knocks, of course, pays homage to the Mac Miller’s Knock Knock song, which was heavily featured in 24/7.

There’s a saying on the right sleeve, “What a Great Day,” which is apparently something Jaromir Jagr says every day: []

The left sleeve of the shirt features the Stanley Cup logo. According to equipment manager Derek Settlemyre, the quote on the right sleeve, which is “What a Great Day,” originates from Jaromir Jagr's mouth daily.


See the full picture of the shirt here. Sadly, the Flyers aren’t selling them, but our friends from Philly Phaithful are selling this one: [buy any 2 shirts, get a free "Philly Never Stops Fighting" t-shirt for FREE]

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You know what to do.