Masticar

Masticar (食い荒らす (くいあらす), Mushamusha; Spanish for "Chomp", Japanese for "Devour") is an advanced ability that allows the user to absorb energy and replenish their own reserves.

Overview
A tendency attributed to newly birthed hollows is their uncontrollable urge to feast upon the souls of others; without the fulfillment of such a chore, their existence would undoubtedly meet an abrupt end. In that sense, this technique can more thoroughly be identified as an advanced eating application made available to a select few arrancar, granting them the ability to quite literally consume anything, even non-sentient pieces of matter, so long as it composed of a soul. The process consists of separating the object in question into two separate matters; the soul is extracted and absorbed by the arrancar, replenishing and adding to their own reserves of energy and the unusable portion is secreted in the form of a gas through the arrancar's hollow hole, ridding of it in the same form as waste.