ท่อนซุง(tôn sung)

Meanings

2NounB2

figurative: sleep very soundly (as in นอนเป็นท่อนซุง)

Figurative use: chiefly in the idiom นอนเป็นท่อนซุง ‘sleep like a log’, meaning to sleep very deeply and without moving; by extension, can compare someone or something to a log for heaviness or inertness.