1 definition by Captain America Ranger
Everybody In Battalion: A female groupie of the 75th Ranger Regiment, also known as a Rangerette, whom participates in sexual acts with at least a hundred Rangers from one of the Ranger Battalions. EIB is a pun that is based on an actual award called the "Expert Infantryman Badge."
1)Amber, a Rangerette, quickly earned her "EIB" title when she went on a three month sex spree with a hundred Army Rangers.
by Captain America Ranger October 15, 2012