After a night spent drinking, 20-year-old Aaron O'Neil decided he didn't want to go to work the following day.

But instead of pulling a sickie, O'Neill, from Ireland, paid his 'profoundly stupid' friend to call in an ISIS bomb threat from a payphone.

The ensuring mayhem disrupted air traffic control, prevented 4,000 people from going to work, shut down a motorway and lost Intel an estimated 6,000 hours of production, The Irish Times reported.

Aaron O'Neil paid a friend to call in the bomb scare because he didn't want to go to work the following day

He has now been told to expect a sentence of 200 hours community service when he appears for sentencing at Dublin Circuit Criminal Court.

A court heard how O'Neill's friend, Colin Hammond, 21, called in the bomb threat from a payphone outside his home about 6am on January 13, after being paid to do so by O'Neill.

Hammond, who was sentenced to 200 hours community service in October, told the operator there were bombs at the Intel complex that would detonate in 12 hours' time.

He added: 'You will not find them. This is a warning, we're everywhere now.'

When asked who he was, the 21-year-old later - described by a judge as 'profoundly stupid' - stated: 'Islamic State.'

O'Neill was arrested in March, after Hammond's voice from the hoax call was recognised by a Garda officer during a separate incident and he explained what had happened.