A man who is very big in the pants. A big penis boy is usually around 8 inches or more.
Wow Randall, you are a big penis boy! That thing dangles to the floor!
by BIG PENIS BOY BJ March 17, 2009
When someone has a very large penis, you can refer to him as big penis boy.
Damn, you're hung like a horse you big penis boy. That looks like a 30 incher!

I mean that is a big penis boy, he is dibision bun for sure
by Halasheek Muhammammad October 08, 2009

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