The Equality and Human Rights Commission (EHRC), which champions equality and human rights for all, is backing the employment claim of a salesman, the Argus reports.
Stephen English, a father of three, claims he was the victim of homophobic taunting from colleagues for five years when they found out he lived in Brighton and had been to boarding school.
The 56-year-old had been an employee at Thomas Sanderson Blinds in Portsmouth between 1996 and 2005 and alleges that he was the target of jokes about Brighton and homosexuality from 2000.
In a statement handed to a tribunal, Mr English said: "I gradually grew more and more upset and worn down by these sorts of comments, particularly as my daughters were now teenagers and very impressionable."
Meanwhile, a EHRC spokeswoman stated: "A positive ruling would help a wide range of individuals who have suffered harassment based on out of date stereotypes."