A ridiculous kind of beard covering over 95 percent of the face in order to hide bullet wounds or herpes. Named after the ruthless IRA warlord and international criminal Gerry Adams, now leader of the Sinn Fein party.
Friend: You are getting a bit of a gerry.
Man: My face is horribly scarred =
Friend: Just do a gerry adams and grow a beard.
From the late 1980s onwards, Gerry was a very important figure in the Northern Ireland peace process.