Losing my face

It is like the term "losing my mind" accept it physical. Like being clumsy or messing stuff up.

I keep messing stuff up I'm losing my face

Losing Sight Out of My Ear

When you are so discombobulated by not having something your brain can comprehend anything.

Note can also be used with other senses and body parts.

Lost the smell in my eyes.
Can’t taste anything with my nose.

And so on.

I’ve not had a Coke for a week I’m losing sight of my ears.

I’ve not had sex in a month I’m losing sight out of my ears.

losing heroine

a girl (especially fictional ones) who has been rejected by her crush

Nukumizu: "So you weren't even going out? Then it's not cheating at all!"
Yanami: "I-I mean, it was basically like we were half-dating though. And if that soggy cow hadn't waltzed onto the scene, we'd probably still be together!" (She was talking about the other girl whom her crush rejected her for)
Nukumizu: (to himself) "Wasn't she a 'dear friend' a moment ago?"
Yanami: (crying) "But I get it. If I'd worked up the courage sooner, things might not have turned out like this."
Nukumizu: "W-Well, you might be right."
Yanami: "I'm sorry I'm such a mess today."
Nukumizu: "No, it's totally fine. (to himself) That's not what you need to apologize for."
Yanami: "But I'm okay with it. As long as Sosuke's happy, I'm okay with it."
Nukumizu: (to himself) "What a spectacular reaction to getting rejected. Speaking of, there's a term that perfectly describes girls like her. Yanami Anna. Yes, it fits you perfectly. You're a 'losing heroine'."