What Does It Mean If I'm Solid?

So I'm 5'6 and weigh 191 pounds (Well I do today. My weight fluctuates; like I could literally wake up and be 187 lbs. tomorrow.). So of course for my size I'm overweight (girls my height should be 117-120 lbs.) and I've always considered myself fat. Yet my mom calls me curvy, my friends say I'm thick, and my family says I'm solid since to them I don't look like I weigh more than 150. I just want to know what exactly does solid mean?

Yes ur pretty healthy I would say. Solid means curvy or strong in here.