Definitions

1. noun

a surname of Irish origin, especially one of the many Irish families of that name who were known as lords of the O’Neill dynasty in Ulster.

“The O’Neill family has a long history of leadership in Northern Ireland.”

2. verb

to make a big show of something, especially by talking or boasting about it.

“He oneilled about his new car, but when I saw it, it was just an old model.”