Probably made in the late 80's or early 90's. What was the name of that movie? Gavin's role was not a leading one.

Not familiar with him, but found these two Irish movies he was in.. not really the dates you described, so I included a link to IMDB - you can go through his bio there...
Disco Pigs (2001) - IMDb (http://www.imdb.com/title/tt0236157/)
Breakfast on Pluto (2005) - IMDb (http://www.imdb.com/title/tt0411195/)
IMDb - Gavin Friday (http://www.imdb.com/name/nm0294859/#Self)

Amazon.com: Boxer: Gavin Friday, Maurice Seezer, Maurice Seezer: Music (http://www.amazon.com/Boxer-Gavin-Friday/dp/B0000062XY)

That's so funny... I was looking for the 'Sneezer' man...

I was looking for Caesar, not Seezer.