Jack -

Stallion. You're known as 'the fastest' newsie in all of New York, so the newsies started calling you Stallion since you're basically as fast as one.

Davey -

Schoolhouse. They couldn't think of anything else really creative and since you're the only one that goes to school, it just fit.

Racetrack -

Goil. You're the girl of the group, thats all xD.

Spot -

Worker. You probably work the most out of the friend group and the newsies like to acknowledge this by calling you 'Worker'

Crutchie -

Doc. They know you have an apprenticeship with a doctor and hope to be one one day so they came up with the name.

Mush -

Stitches. When you and your friends hang out with the other newsboys, you're usually working on some dress and so they started calling you stitches.

Blink - 

Four eyes. I forgot to mention but you happen to wear glasses so as a joke, the other newsies started calling you four eyes. It's even more ironic with Blink as your boyfriend...

Skittery -

Dirt. You're a maid and practically hate messes so it's super ironic and hilarious that they call you dirt.

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I'm watching glee right now and crying help