A phrase for when something is cute or wholesome, similar to the positive definition of 'That hit me in my feels.' Intended to show that something is so cute or wholesome that it's had a stronger effect on you than simply going 'aww, cute' and moving on.
Variations include 'My uwus have flown', 'My uwus, they flew!', and other phrases like that-as long as the uwus are gone, the meaning remains.
Bunny: Look at these sting ray pups! They're smiling!
Alice: My uwus flew!