Definition of sprogs:
(n) :
(UK, Australia, Canada, Ireland, New Zealand, informal, humorous) A child.
(n) :
(UK, military, RAF, slang, derogatory) A new recruit.
(v) :
(UK, Australia, slang, humorous) To produce children.
(v) :
(Australia, slang) To ejaculate, to come.
(n) :
(uncountable, Australia, slang, dated) Semen.
(n) :
(countable, slang) A deflection-limiting safety device used in high performance hang gliders.