Green’s Dictionary of Slang

spod n.

[? Scot. spodlin, a child who is just learning to walk]

(UK teen) an unpopular or socially awkward schoolchild; also attrib.

[UK]Indep. on Sun. Real Life 6 June 3: Turning average spod looks into alarming tabloid pin-up fodder.
[UK]Guardian Sport 20 May 12: ‘Oi,’ says one liberty-taking spod.
[UK]G. Malkani Londonstani (2007) 28: U sit up front wid all dem spods, innit?