Can be referred to either as
bullets which are fired from a weapon, or not having a high enough
sperm count to
impregnate a female.
... Or male depending on which part of the world you come from.
Soldier1 - Die you enemy people!
Soldier2 - Dude, their
still alive!
Soldier1 - I'm
firing blanks..
Dude1 -
Aww man, me and Emma have been trying for months now.
Dude2 - You must be firing blanks man ...