saw wood

saw wood {infml} (to snore loudly while sleeping) — храпеть, давать храпака

Example: .....

drive one’s pigs to market (to snore loudly, to log ZZZs)
The allusion is probably to the snorting noises of swine being herded to market. This expression is apparently an elaboration of the phrase to drive pigs ‘to snore,’ dating from the early 19th century.