What Does It Mean to ‘Catch Some Zs’?

3 Min Read | By Liam Porter

Last Modified 13 June 2024   First Added 11 October 2021

This article was written and reviewed in line with our editorial policy.


‘Catch some Zs’ is both an idiom and an onomatopoeiac meaning to get some sleep, referencing the noise a person makes while sleeping.

Examples of use:

  • I have an early start tomorrow; I’d better catch some Zs.
  • Go catch some Zs, things will look better in the morning.


The origin of the phrase ‘catch some Zs’ appears to be an interestingly winding road of lateral thinking. In fact, the origin of catching Zs owes its existence to another idiom. That of ‘sawing logs’ or ‘sawing wood’.

Unfortunately, the exact origin of the phrase used in this way is lost amidst instances of individuals actually sawing logs and patent applications for machines that would reduce the labour required to saw logs.

Related: What Does Sleep Like A Log Mean?

catch some z's image

What we can say for certain, however, is that the use of the initial ‘Z’ as indicative of sleep can be dated with some degree of accuracy to a German comic strip called The Katzenjammer Kids (1897 – 2006) and specifically to a 1903 strip that sees a sleeping man’s beard removed with a lawnmower.

cartoon showing the phrase catch some zs

The use of Z became fairly ubiquitous in cartoons and comic strips, growing in popularity throughout the 20th century, evolving from the sawing of logs to become the primary visual shorthand for a deep, sonorous sleep.

So how did we take that last step from drawing Zs to catching them? It appears to have been around the middle of the century, potentially as a result of the proliferation of comic books in the 1940s and 1950s.

While not published until 2013, the Hippie Dictionary: A Cultural Encyclopedia of the 1960s and 1970s indicates that the phrase was in common use during the period.

catch some zs text example

However, the real paper trail doesn’t begin until the late 1970s and early 1980s in poetry and in reported speech such as in a 1977 motorcycle periodical from Harley Davidson (‘after catching some z-z-z-z-z’s we headed over to Phil’s place’) or the following example from the 1983 edition of the Racing Pidgeon Bulletin:

catch some zs example text 2

The crossover from visual shorthand to verbal idiom probably occurred in the mid-to-late 20th century, before becoming increasingly popular in spoken English from the 1990s and into the early 21st century.

Notable appearances in popular culture:

As you’d expect of such a well-known phrase, ‘catching some Zs’ and various close approximations appear in every form of media. This includes such stand-out moments as Snoop Dogg’s Snoopafella, which sees the titular Snoop star in a reimagining of the Cinderella story (borrowing heavily from the 1987 song Cinderfella Dana Dane by Dana Dane):

For other well-known sleep idioms check out what ‘hit the hay‘, ‘sleep tight‘, ‘up the wooden hill‘ or what waking up on ‘the wrong side of the bed‘ means.

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