Salah satu makna hardcore itu adalah anggota paling fanatik. Big Apple tiada lain kota New York. pin mengacu kepada pancang-pancang sasaran boling, pals adalah teman-teman akrab.

Kamus Oxford:
hard core the most active, committed, or doctrinaire members of a group or movement

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Note added at 57 mins (2013-02-08 10:37:55 GMT)
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Ref: http://en.wikipedia.org/wiki/Big_Apple
"The Big Apple" is a nickname for New York City. It was first popularized in the 1920s by John J. Fitz Gerald, a sports writer for the New York Morning Telegraph.

Ternyata juga, ada klub boling kartun bernama Pin Pals, mungkin plesetan dari pen pals (sahabat pena).

Ref: http://simpsonswiki.net/wiki/Pin_Pals
The Pin Pals were a bowling team. They were originally composed of Homer Simpson, Moe Szyslak, Apu Nahasapeemapetilon and Otto Mann. Otto was later replaced by Charles Montgomery Burns.

Jadi, bisa jadi penggemar fanatik boling sekaligus kartun Simpson...