biggie
[noun]
Synonyms: notable, big boy, big noise, big shot, big-timer, big wheel, chief, heavyweight, leader, lion

[TahlilGaran] English Synonym Dictionary ▲

big‧gie /ˈbɪɡi/ noun

1. [countable] informal something very large, important, or successful:
I think their new CD is going to be a biggie.

2. no biggie American English spoken said when something is not important or when you are not upset or angry about something:
‘Oh, I’m sorry.’ ‘No biggie.’

[TahlilGaran] Dictionary of Contemporary English ▲