I think it means 'bite me'.

Shop forced to call police after druid refuses to pay because cashier wouldn't ask for the money in WELSH

A druid refused to pay for his items at a small shop in a North Wales town because staff refused to tell him the total in Welsh.

Archdruid Dr Robyn Lewis, 83, was at the Spar store in Pwllheli where he wanted workers to speak to him in the native language.
However, the shop's owner said that the situation had been 'completely blown out of proportion'.

Police were called after Dr Lewis - former Archdruid of the Gorsedd, a group that promotes Welsh literature, poetry and music - was given the option of paying 58.62 for his shopping or leave.

more wankerism