I wish I was as slim as you.
You have a slender figure.
He's big and beefy.
He's heavy-built and muscular.
She is plump without being fat.
He's putting on weight.
He's gaining weight.
No chocolate, please. I'm on a diet.
She's dieting to lose weight.
I need to go on a diet.
I don't want any cake. I'm slimming.
A: I've been putting on a few pounds these days. Have you got any suggestions on how to lose weight?
B: How much do you weigh now?
A: About 150 Pounds. Can you believe it?
B: But that weight looks good on you. I certainly don't think you need to lose weight.
A: But I wish I had a slim figure like you. How often do you exercise?
B: I go to the gym three times a week.
A: What kind of exercise do you like to do?
B: I like to pump iron, swim and go hiking.
A: Cool. I'm just not interested in doing exercise. Are there any other ways I can lose weight without exercising?
B: Then I'm afraid that you have to go on a diet. Eat less or no rich food and sweets.
A: I will.
B: Even if you're going on a diet, you still need to make sure that you have a good breakfast.