Green’s Dictionary of Slang

jobbie n.2

also jobby
[job n.2 (3) + sfx -ie; note W.I. use, for children only]

1. (orig. Scot.) a piece of excrement, a turd.

[Ire]R. Doyle Paddy Clarke Ha Ha Ha 200: He did a jobby, I told them all. – Down his leg.
[UK]S. Bell If... 11 Dec. in If Files (1997) 119: Crikey! That’s the biggest jobbie I’ve ever seen in my life!
[Ire]P. McCabe Emerald Germs of Ireland 335: I hope you haven’t done jobbies in your trousers!

2. a general term of abuse.

[UK]M. Dibdin Tryst 155: Hey, you black jobbie, did you no’ hear the bell?

In compounds