{n. phr.} A random attempt or guess at something without previous experience or knowledge of the subject. * /"You're asking me who could have hidden grandpa's will," Fred said. "I really have no idea, but let me make a stab in the dark - I think my sister Hermione has it."/
STAB IN THE DARK
Meaning of STAB IN THE DARK in English
Dictionary of English idioms . Словарь английских идиом. 2012