Which Irish words have passed down into English?

I was born into an Irish family living in London. This has left me with an Irish name, an English voice and an extra trove of words and phrases that have passed down from the Irish language.

Irish English: What is a gossoon?

gossoon  Irish    a  boy  [C17:   from   Old   French   gararçon ]

Where does the word #hashtag come from?

Hashtags are the # symbols used on Twitter and other social media, like Instagram and Facebook.

What does inside baseball mean?

Inside baseball  is a term popular with political and media analysts.

What is the 'be all and end all'? Where does it come from?

The 'be-all-and-end-all' is now used to refer to a decisive life-changing event. It is usually used in the negative e.g. Your exams are important but are not the be-all-and-all.

What is schmutter?

schmutter [ˈʃmʌtə]  noun