In the teeth of something
Definition 1 of 2
Pro Tip 1/3Bravery Connotation
Using this phrase often suggests courage in overcoming challenges. 
She pursued her education in the teeth of financial difficulties.
Pro Tip 2/3Persistence Emphasis
Highlights determined action despite serious challenges. 
He continued the rescue in the teeth of the storm.
Pro Tip 3/3Emotional Impact
The phrase adds drama, emphasizing the intensity of the struggle. 
In the teeth of public outcry, she stood firm on her decision.