I can't breathe with a mask on
A fancy way of saying 'I'm too fat to wear a mask and I hate life.'
'I can't breathe with a mask on, I feel like I'm drowning in my own laziness.'
Yelling at the bus driver, 'I can't breathe with a mask on, I need more oxygen and a snack.'
'I can't breathe with a mask on, I'm a human meatball and I'm suffocating.'