哎哟少年你这是喜脉啊
[āi yo shăo nián nĭ zhè shì xĭ mài a]
In a teasing manner, saying “Oh! Young man, you got pregnant?” ('You have the pregnancy pulse') This is usually said humorously when someone feels particularly happy or joyful. In the olden days before modern pregnancy tests, ancient Chinese doctors could diagnose by checking pulses. So this expression implies one is experiencing something positive and big in their life similar to getting a pleasant surprise or having great luck.