a sinking feeling

(informal)

a feeling that something bad is going to happen I had that sinking feeling you get going into an exam you haven't studied for.

Name	Pronounced	Usage
Shaquille	-	English (Modern)
Aonghas	-	Scottish
Leofstan	-	Anglo-Saxon
Taffy	-	Welsh
Recep	-	Turkish
Morgen	-	Arthurian Romance