{literary} A person who knows a little about something may think he knows it all and make bad mistakes. - A proverb. * /John has read a book on driving a car and now he thinks he can drive. A little knowledge is a dangerous thing./
A LITTLE KNOWLEDGE IS A DANGEROUS THING
Meaning of A LITTLE KNOWLEDGE IS A DANGEROUS THING in English
Dictionary of English idioms . Словарь английских идиом. 2012