sprog
1. noun
1
a baby; a child. From obsolete 'sprag' (a lively young fellow) UK, 1706.
2
a recruit. Royal Air Force originally, then Royal Navy, now police. Probably derives from obsolete 'sprag' (1706) 'a lively young fellow' but etymological theories abound: a reversal of 'frog spawn' – because it's so very green; a confusion of 'cog and sprocket' – a metaphor with the recruit just a cog (a sprocket) in a wheel; a distortion of 'sprout'; it has also been claimed that a 'sprog' is 'a young gannet' UK, 1941.
3
semen AUSTRALIA, 1992
2. verb
to parent a child UK, 2000