An Irish teenager suffers Tourette's syndrome so chronic he is unable to stop shouting "I'm a terrorist" and "bomb" while walking through airports and sitting on planes.

Lewis Nickell says visiting an airport, surrounded by fellow passengers and vigilant security personnel, is "one of the trickiest things someone with Tourette’s or suffering from tics can do".

The 17-year-old has posted video of himself walking through an airport on his blog, which documents the challenge of living with his socially debilitating disorder, The Telegraph reports.

Nickell is seen strolling inside the airport, where he repeatedly yells "bomb" and identifies himself as a "terrorist".

He can also be heard saying, "there's a bomb on the plane".

Saying the word "bomb" anywhere inside an airport is no joke. Australian federal police will arrest airline passengers who claim to be in possession of an explosive device.

"Comedians" face convictions and a maximum fine of $5000 under Australian law.

Nickell, who only developed Tourette's nine months ago, also serves up a constant stream of profanity in his video.