Booja is the substance inside of a plasma pistol in the halo series.
other Phrases Related are "Spilled Booja," or Spilling Booja."
Pronounces with a hard "J"
"Man I spilled booja that game."
"Man I am spilling booja all over these kids."
A poopy Grenade is when someone on Call of Duty 4 throws a Frag Grenade with no clue of where the enemies are.
Some people might call Poopy Grenades, Random Grenades.
Other dummber people might call them strategically place grenades based on the spawn of the other team.
But really they are just taking an advantage of a flaw in the game type.
The point being, is that all Poopy Grenades take no skill to use.
MattNat threw a poopy grenade and Lil Brane got killed by it and MattNat cocked off.
This example means that MattNat is a noob