Is it possible to lose weight while have junk food 4 times a week?

It's possible to lose weight and eat nothing but junk food. It's not healthy, but it's possible. As long as you're burning more calories than you're consuming you will lose weight. When we consume more calories than we burn our bodies store the extra energy as fat. If we burn more calories than we consume our bodies break fat cells down to create energy.

I mean, if you eat ONE meal four out of seven days and train like crazy on the back, you'd still lose weight, just not in a very healthy way

Diet is around 80% of the work of losing weight.

Mostly depends on just how much junk food.

sure it’s “possible”. but depends who you are - like how old you are and what your body is like and what it does physiologically

Depends. Are you having a half cup of ice cream or a half gallon? It’s all about portion sizes.

Sure! That doesn’t mean it’ll be a good kind of weight loss though.

if thats the ONLY food you eat all week, yes

Nope its not possible in my opinion

I do it all the time 😂

Not really, imo.

Yes. It's just harder.