People from around the world have shared snaps of the hilarious signs they have come across.
Social media users, largely from the UK and US, spotted the witty posts in cafes, offices and on the side of the road.
The pictures, collated in a gallery by Diply, include a snap of a jar of dead batteries with sign reading 'free of charge.'
In another picture, a sign written by a cat owner features a picture of the feline with the world 'don't believe his lies', asking people not to feed him.
Social media users, largely from the UK and US, spotted the witty posts in cafes, offices and on the side of the road. Pictured, Polly Chester's office cubicle sign was given a witty update
Out of power: This snap, taken in the US, shows a clever play on words on dead batteries
Good enough to eat! This clever sign in a Vietnamese restaurant, believed to be in the US, imagines 'four' replaced with 'pho'
Know the feeling! A US bathroom user put up a sign telling off people who 'repeatedly tried to open it' while there was someone in there for giving the inhabitant 'paralyzing anxiety'
Don't slip up! Meanwhile in one British shop the owner joked that you should 'act like your mum is here' as they told customers that there was CCTV in operation
Curb appeal: This American bar came up with a funny sign to entice passing customers
A paw-ful liar! This little guy's owner was tired of his cat escaping to the cafeteria to get extra food so made sure to let people know he was well-fed
'Can you Spock what's been changed in this picture? (See what I did there? I impress myself sometimes!)', the person behind this New York poster joked
An important date: A work place's employee did not forget the anniversary of this US office's coffee machine the day after Valentine's Day
Say it out loud! The serial number on this toilet cistern, in the US, reads 'for you to pee into'
Truth hurts! This American parent is brutally honest about their child's current state of mind
They know you so well! This American social media user chuckled at their coffee bag