It may all seem fun. Just a little bit of “banter” to relieve the tedium of a long working day. But, the Courts have used calling nicknames as evidence of discrimination.
In the case of Dove v Brown & Newirth Ltd , the Employment Tribunal awarded £63,391 to a salesperson who was nicknamed “Gramps” by his younger colleagues and later dismissed after feedback from customers that he was “old fashioned” and “long in the tooth”.
In Nolan v CD Bramall Dealership Ltd t/a Evans Halshaw Motorhouse Worksop  , the Employment Tribunal said that the employer discriminated against Mr Nolan on the grounds of age by making him redundant because he was close to retirement. The Tribunal drew an inference of age discrimination against Mr Nolan from workplace banter related to age, including colleagues nicknaming him “Yoda”.
In Ruda v Tei Limited  the Employment Tribunal said that calling a Polish employee “Borat” was discrimination. Mr Ruda won his discrimination claim.
In Davies v Remploy Ltd , colleagues nicknamed a wheelchair using employee “Ironside”. The Employment Tribunal said that this was harassment and awarded him compensation.