1 C1 idiomatic slang
To relax completely in an idle, do-nothing state for an extended period.
"After a brutal week of exams, I just want to moss out all weekend and not speak to anyone."
moss out
C1 slang intransitive
A very rare informal expression meaning to relax completely, doing nothing, or to become settled and inactive like moss growing on a surface.
In plain English
Relax completely and do absolutely nothing, like moss that just sits still and grows slowly.
What does "moss out" mean?
One main meaning — here's how to use it.
Literal vs figurative
Words literally mean
To grow out like moss — still, passive, covering a surface without effort.
Actually means
Relax completely and do absolutely nothing, like moss that just sits still and grows slowly.
Usage tip
Extremely rare and poorly attested. The imagery suggests becoming as still and unhurried as moss. Not a recognised standard expression; may be encountered only in very specific dialects or individual speech. Not recommended for active use.
Words that pair with "moss out"
Natural word combinations native speakers use most often.
sofa weekend afternoon
How to conjugate "moss out"
The five tense forms you'll use most often.
Base
moss out
I/you/we/they
3rd person
mosses out
he/she/it
Past simple
mossed out
yesterday
Past participle
mossed out
have + pp
-ing form
mossing out
continuous
Hear "moss out" in the wild
Listen to native speakers using "moss out" in real YouTube videos — click a clip to watch it on Looplines.
Keep exploring
Jump to every phrasal verb built on the same verb, particle, or level.