"a single slip" is correct and can be used in written English.
You can use it to refer to a mistake or error that was made, especially when the mistake was minor or of little consequence. For example: "I made a single slip on the exam, but I still managed to get a passing grade."
A single slip and I'm gone.
The sight of his strike bowler, Anderson, bowling to a single slip left that most direct and uncomplicated of former Australia captains Ian Chappell, among many others, gobsmacked.
The vulnerability you feel exposed to the elements and to other road users, aware that a single slip could be catastrophic, makes all your senses acute.
A single point separated Barcelona, Atlético, and Madrid as they began a five-game dash for the line, knowing that a single slip would end it.
Changing eating habits have increased the scope of food-borne disease so that huge numbers of people can now become ill from a single slip in food hygiene.
When a man, with a single slip of his tongue, can turn you into the envy of investigative reporters, you have to go into any discussion with him armed with banana peels.
Such is the logjam between sixth and 11th that a single slip-up could prove costly.
A single slip-up, or one bad experience, can be enough to put people off a brand forever.
That will sap the opposition's energies and if they make a single slip-up, you can always have their candidates struck from the ballot.
The updates must go through testing with both Motorola and the carriers before being sent out to the masses, and a single slip-up somewhere down the line could slow things up considerably.
It can take the form of a single slip-then-flip or a series of violent oscillations.
