throw in the towel

US /θroʊ ɪn ðə ˈtaʊəl/
UK /θroʊ ɪn ðə ˈtaʊəl/
"throw in the towel" picture
1.

to give up or admit defeat

:
After losing three games in a row, the team decided to throw in the towel.
Despite the challenges, she refused to throw in the towel and kept fighting for her dreams.