When
one's arms are particularly large; the muscular state of
one's arms after a workout....Derived from the word "
pipes", referring to the arms.
Sean: "Shiiiiit, I gotta wrestle Dan next week in the sectionals."
Max: "No easy task there,
dude. Saw him last week. I
don't know if he'd just come from the gym or what, but that
mofo was all piped up."