"JCB starter buttons" - A woman's nipples resembling the control to start the engine on a vehicle manufactured by JCB
*Exclamations emitting from a building site probably around the Toombridge/Limavady area of Ireland* 'Look at thon!' ..'Aye JCB starter buttons sir'
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used in rural Ireland to describe a woman's nipples if large
she has nipples on her like JCB starter buttons
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