sprog UK /spɹɒɡ/US /sprɔɡ/noun 4verb 2forms 3 noun4 •(UK, informal) A child.Any guardianship or trusts that you set up when your children were little sprogs may no longer be needed. — 2008 •(slang, disapproving) A new recruit. •(slang, old-fashioned) Semen. •A deflection-limiting safety device used in high performance hang gliders. verb2 •(UK, slang) To produce children.You must have been terrified, it′s not like today with film stars sprogging babies everywhere. — 2007 •(Australia, slang) To ejaculate, to come.The kid was fathered by the same guy who sprogged into Debbie Finch′s throat. — 2004 formssprogged · sprogging · sprogs