Pain Threshold

"How wimpy are you?" would have to be the layman's version of, "What kind of pain threshold do you have?" Although a doctor will ask you about your pain to try to determine its source, I doubt any doctor would ask you such a question because everyone perceives pain differently. One person may cut themselves to the bone and hardly feel the pain at all, while another may cry out from a simple paper cut.
"Suck it up" is probably the layman's way of saying, "I think there is a significant emotional component to your pain". From the time we are young crying out for our mother's attention or blocking painful outcries so as not to be thought of as a sissy, we develop emotional patterns to our pain. Many authors like Louise Hay and intuitive healers believe all pain and disease processes have an emotional orgin. I have come to believe that our physical well being is a direct reflection of our emotional well being.
"That looks like it hurts" would have to be the layman's way of saying "There is a significant physical component to your pain". There are occasions when your pain receptors are stimulated and you should have pain, a message to your brain that you need to change or do something differently. It is not uncommon to see terrible arthritis, healed compression fractures, or healed rib fractures on x-rays in patients with no pain in the affected area. Innately our bodies are capable of completely healing from (almost?) anything if we eliminate the physical AND emotional component of the pain.
"You are always whining about something hurting" would be the layman's way of saying, "There must be a physical orgin to your pain, but it is difficult to determine what that is because of your overlying emotional components and my limited knowledge." We often expect our bodies to heal themselves when we experience pain, and therefore do little to nothing to change or do something differently. A diabetic may just take more medicine when eating a high glycemic meal; or after a spinal surgery a person may not retrain their muscles to function properly with therapy and return to the same lifestyle or activities that caused the biomechanical dysfunction to start out with. Alcoholics, and people using multiple medications will almost always have a lower pain threshold and more chronic pain. Once a person has allowed multiple incidences of pain to occur without making any changes, chronic pain is almost a guarantee. So choose wisely.