Show-off Sumou. This is Sumou where imposing and unconventional techniques are sought as an end in itself.
This has no Value. It goes against the spirit of Sumoudou. You cannot Prove Yourself this way.
Rikishi having done Pretentious Sumou include Asashouryuu using Tsuriotoshi to show off in Shoubu, Asanowaka doing a frog-like Shikiri, and Mitoizumi and Kitazakura throwing extraordinarily huge handfuls of salt after the last Shikiri.