Celebrating crowds get the Brexit party started at Westminster

What do you think the phrase 'Big boy' implies about the subject?

In what contexts might the phrase 'Big boy' be used?

How does the phrase 'Big boy' reflect on the character or person it describes?

What emotions or reactions might the phrase 'Big boy' evoke in different audiences?

Can you think of any cultural references or media that use the phrase 'Big boy'?