take a stab in the dark

To make a guess or estimate with very little or no assurance as to its accuracy. I had absolutely no idea what the answer was for the last question on the exam, so I just took a stab in the dark and hoped for the best.

Common Names:

Name	Pronounced	Usage
Tillie	['tili]
Taryn	TAHR-in	English
Aghi	-	Ancient Scandinavian
Leandro	le-AHN-dro (Spanish)	Spanish, Portuguese, Italian
Wenona	wə-NON-ə	English (Rare)
Vitomir	-	Croatian, Serbian, Slovene, Medieval Slavic