Dormir a pierna suelta

to sleep like a log; **to sleep like a log**; **to sleep soundly**; **to sleep like a baby**; **to sleep deeply**

Dormir a pierna suelta means to sleep very deeply, comfortably and without being disturbed.

The expression suggests complete relaxation and the absence of worries or interruptions.

Someone who duerme a pierna suelta is enjoying an excellent night's sleep.

• sleeps soundly
• does not wake up easily
• finally gets a good night's sleep
• rests after a tiring day
• sleeps without worries

It emerged from ordinary usage, where an expressive image mattered more than any pedigree.

One traditional explanation suggests that someone sleeping peacefully allows their legs to relax completely, free from tension.

Whether or not this is the true origin, the image became firmly associated with deep, carefree sleep.

Modern speakers no longer think about the literal position of the legs.

The expression simply means sleeping exceptionally well.

Spanish speakers often associate dormir a pierna suelta not only with physical rest but also with peace of mind.

Someone who has solved a problem or finished a difficult task may say:

Esta noche voy a dormir a pierna suelta.

The implication is that worries have disappeared.

Spanish has two wonderfully contrasting idioms about sleep:

• Dormir a pierna suelta → to sleep deeply and peacefully.
• No pegar ojo → not to sleep at all.

Native speakers often use them as natural opposites:

Anoche no pegué ojo.

Anoche dormí a pierna suelta.

Together, they cover two of the most common experiences people talk about every day.

Do not translate the expression literally.

English speakers would never say:

I slept with a loose leg.

Instead, use expressions such as:

• I slept like a log.
• I slept soundly.
• I had a great night's sleep.

The image of the leg is unique to Spanish.