From Longman Dictionary of Contemporary Englisha shot in the darka shot in the darkGUESSan attempt to guess something without having any facts or definite ideas 🔊 My answer to the last question was a complete shot in the dark. →shot
Examples from the Corpus
a shot in the dark• Let's see if she's at Fiona's house. It's a shot in the dark, but we've got to start looking somewhere.• My answer to the last question was a complete shot in the dark.• That was a shot in the dark, but judging from the expression on his face it struck home.