Woman who thinks she's an expert mechanic, when she can't even find her keys half the time.

Woman who won't stop trying to impress people with nonsense - doesn't know what she's talking about.

A Bloomer is someone with a bright outlook on life who is optimistic in nature. Bloomer's frolic in every opportunity to be happy and try to make the most out of life. The opposite of a Bloomer is a Doomer. The term Bloomer originated specifically as a counter to the Doomer on sites especially like 4Chan.