Origin of "When come back..."

In My Humble Opinion
1

What is the origin of the phrase, oft-sighted at these boards, “When come back, bring [insert thing here]”?

2

http://www.weebl.jolt.co.uk/pie.htm

3

Weebl and Bob sound Thai.

Sound Thai, like pie.

Thanks, Gorsnak - I learned something today.

WRS/Thû