Dale Price wears a different fancy dress costume every term day as he waves off his son, Rain, on the school bus to embarrass him.
The stay-at-home father has used 170 different outfits so far and once even sat on a toilet outside the house with his shorts round his ankles reading a paper.
On other occasions, Mr Price has squeezed his burly body into mermaid, Wonder Woman, Batgirl and bridal fancy dress.
Mr Price and his wife, Rochelle, first waved their 16-year-old son off last August – dressed normally – to embarrass him when the school bus stopped outside their house in American Fork, Utah.
When he overheard Rain saying: ‘Mum, don’t let dad go out there again’, he took it as a challenge and decided to up the ante. The next day he appeared in a San Diego Chargers American football kit.
‘When he did it the first day I was in shock,’ said Rain. ‘You don’t want to see your dad dressing up in a wedding dress, waving at you on the bus.’
Mr Price said: ‘I hope this lives with him for the rest of his life.’