"My heart ___ ..."

• Dipped
• Ended up on the ocean floor
• Hit the bottom of the barrel
• Sent to the bottom
• Took on too much water
• Scored, as a free throw
• What the Titanic did, famously
• Suffered the Titanic's fate

Longman Dictionary of Contemporary English Word definitions in Longman Dictionary of Contemporary English
EXAMPLES FROM CORPUS ▪ And all heard single pure sounds, of varying pitch, that swiftly sank below the level of hearing. ▪ He scanned the newsprint greedily while his teeth sank into the bacon sandwich, the melted margarine dribbling over his fingers. ▪ ...

Wiktionary Word definitions in Wiktionary
vb. (en-simple past of: sink )