Is there an explicit/crude saying for bravery in Chinese?
The size of one's 胆 (gallbladder) is metaphorically an indicator of courage, 胆大 = brave; 胆小 = cowardly

有种   (have pedigree) --&gt; having great pride --&gt; brave

Example sentence:
有种你别跑!  - if you have pride (dare), don't run
有种你别再追!  - if you have pride (dare), stop chasing me

斗胆: (gallbladder as big as a 斗): bold; brazen

吃了豹子胆  (ate leopard gallbladder) = brave; bold; brazen

胆大包天 / 胆包天 (brave enough to take on the world) = brave; bold; brazen


Cantonese:

胆生毛  (gallbladder grows hair) It is so big and manly, it grows hair

沙胆 (sandy gallbladder)  sandy-&gt; rough --&gt;tough = brave

胆粗 (gallbladder is thick): brave; 胆粗粗咁 (adv): bravely

够姜 (enough ginger = has a lot of spice): brave --&gt; dare to do things plain people don't dare to do

敢死/ 夠胆死 (dare to die/ courageous enough to die) = &quot;damn dare&quot; as in &quot;乜都夠胆死&quot; (damn dare to do anything)