Maimer

"Maimer" is the name of Clarisse's second electric spear. It only appeared in The Last Olympian. Its predecessor (another electric spear) was broken by Percy in The Lightning Thief. Behind her back, everyone calls it "Lamer the second".

The Last Olympian
It played an instrumental role in Clarisse's defeat of the drakon in The Last Olympian. When the campers were fighting the drakon, the drakon killed Silena Beauregard, angering Clarisse and spurring her to kill it. She jumped on its head and stabbed the electric spear into its good eye (Percy had maimed its other eye earlier) destroying both the spear and the drakon. This, in turn, fulfilled a prediction made by the clear-sighted mortal Rachel Elizabeth Dare that a child of Ares would kill the drakon.

The Lost Hero
When Jason showed his weapon ﻿to other half-bloods at the camp fire, someone yelled out that it was even better than Clarisse's weapon, "Lamer", which is what they use to call Maimer when making fun of the spear.