slept like a log

[chappie]

does anyone know why we say we slept like a log?

[Clanad]

Idiom:
sleep like a log/rock
To sleep very deeply.
[Middle English slepe, from Old English sl�p. See slb- in Indo-European Roots.]

Also, sleep like a top. Sleep very soundly, as in "I slept like a log", or "She said she slept like a top". Both of these similes transfer the immobility of an object to that of a person who is sound asleep (since a top spinning quickly looks immobile). The first dates from the late 1600s; the variant is newer. (With thanks to The American Heritage Dictionary of Idioms).

[andy hughes]

A log is a compoletely inert object, so to sleep 'like a log' inders that you did not move at all in your sleep, because you slept very deeply.

"I slept like a log last night, I woke up with my head in the fireplace!"

I thenk yaou! Tell your friends, I'm here all week!

[ladybird1960]

Sleepers are made out of wood hence SLEPT LIKE A LOG.