Covered in sweat; drenched with sweat. Used to describe someone or something soaked from sweating.
ランニングをしてシャツが汗まみれになった。
I went for a run and my shirt was soaked with sweat.
汗まみれの手で冷たい水を飲んだ。
I drank cold water with sweat-covered hands.
面接で緊張して汗まみれになった。
I was so nervous during the interview that I was covered in sweat.