A long bar or bolt of iron with sliding shackles, and a lock at the end, to confine the feet of prisoners or offenders, esp. on board of ships.

an iron bar attached to the ground, to which prisoners are shackled by their (hairy) ankles

Bilbo is a PHP frontend to run scans using the security scanner Nessus.

a multitalented logic circuit that can be a state register, a scan register, an LFSR, or a MISR depending on the state of it's mode pins

A rapier; a sword; so named from Bilbao, in Spain.

a spanish blade of peculiar excellence Bill a bill-hook - a weapon