1 definition by The biggest Grammar Nazi
Confidence boost is when a really shy person gets really confident and doesn't care about any consequences of any actions, it always lasts for a day or two. Later the person regrets it.
Jill - Didn't Joe use to be the quietest kid in school? Why is he suddenly so confident now?
Dan - I think he got a confidence boost
Jill - Oh....This better end well
Dan - I think he got a confidence boost
Jill - Oh....This better end well
by The biggest Grammar Nazi October 19, 2015