McDonald's has been left wanting after losing a three-year trademark fight with fast-food rival Hungry Jack's.
The US hamburger giant sued Hungry Jack's in 2020 claiming its sale of the "Big Jack" and "Mega Jack" burgers infringed the Big Mac trademark.
On Thursday, the Federal Court dismissed the allegations, saying neither burger brand was deceptively similar to the Big Mac and Hungry Jack's had not engaged in trademark infringement.