Cystic fibrosis affects the cells that produce mucus, sweat, and digestive juices. It causes these fluids to become thick and sticky. They then plug up tubes, ducts, and passageways.
It is an inherited life-threatening disorder that damages the lungs and digestive system.
Georgette most probably has hypothyroidism which presents with weight gain, easy fatigability (which Georgette has), as well as other symptoms such as constipation, cold intolerance, and slow and slurred speech. Hypothyroidism is caused by the deficiency of thyroid hormones most commonly caused by iodine deficiency followed by the autoimmune destruction of the thyroid gland called Hashimoto's thyroiditis.
1) You can say that you're busy so you won't be able hang out with him or her
2) Say that you don't define ,whatever they are doing, as cool so you will pass
3) You can say that you don't feel well and you have to stay in bed
Hope this helps!! :D