Tinkers is a term for a group of Irish Travellers who worked with tin and mended pots and pans from door to door in rural Ireland before urbanisation in the 1960's. This is a perjoritive term these days and is used to insult Irish Travellers, as gyppo is to insult Romani people (different ethnic nomads in Britain & Ireland).
Not all Irish Travellers were tinkers (from tinsmithing or tinsmith) as there were horse dealers, market traders etc.
Irish Travellers have their own distinct culture, traditions, way of life and language and are indigenious to Ireland and are said to be here in Ireland before the Celts arrived in Ireland 500 yrs BC.
'That is not even make sense' or 'that is not even make Science' it is used to describe a situation that is so outlandishly weird or scientifically incorrect that correct grammar cannot be used to describe the situation.
Widely known as Irish gypsies residing in Ireland and also in the UK. My Irish nan used to tell my mum that if she was naughty one evening that she would "leave her outside for the tinkers", as it was said that they stole children.
Another meaning of tinkers is esctasy pills.
"got any tinkers?" or "tinkers, tinkers, anyone wanna buy any tinkers?" as some drug dealers in nightclubs in the South East of England would say.