Fill with Lead is a gangster term for shooting someone.
Fill with Lead can only be used by Pencil Pusher. This is probably because pencils used to use lead to write things. Now graphite is used, but it is still called lead.
Pencil Pushers say the default phrase, "Take a memo on this!" This phrase is also used in the Cog Move Double Talk.
Although only Pencil Pushers use this attack, the phase files contain an animation for suitC (fat) Cogs sharpening a pencil.