For most units, planning leave is like planning your vacation with a civilian job. You talk with your boss, make sure everything is covered, fill out the forms, get it approved, etc. It's not a big deal. I took a month off to go tour Europe once when I was in the Army.
defecate. 1  to void excrement from the bowels through the anus; have a bowel movement. 2  to become clear of dregs, impurities, etc. 3  to clear of dregs, impurities, etc.; purify; refine.
percolate. 1  to cause (a liquid) to pass through a porous body; filter. ( 2 of a liquid) to filter through; permeate. 3  to brew (coffee) in a percolator. 4  to pass through a porous substance; filter; ooze; seep; trickle. 5  to become percolated: The coffee is starting to percolate. 6  to become active, lively, or spirited.