Where does the word nerd come from? Difference between a geek and a nerd?

nerd nəːd/ noun informal:  a foolish or contemptible person who lacks social skills or is boringly studious. Single minded, expert:  "I was a serious nerd until I discovered girls and cars" synonyms : bore, dull person;  "a computer nerd"

What is a curveball?

In American English a curveball is a deceptive or unexpected action which poses a new challenge e.g. He threw a curveball by threatening to walk out of the meeting.  

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.