“咳出”常见的英文表达是 cough up，该短语强调通过咳嗽将体内的东西（如痰、异物等）排出体外。例如：
He was coughing up phlegm.（他在咳出痰。）
The doctor told him to try to cough up the piece of food that was stuck in his throat.（医生让他试着把卡在喉咙里的食物咳出来。）
此外，根据语境不同，expectorate 也可表示“咳出（痰等）” ，但该词较为正式和专业，在日常使用中不如 cough up 常用。例如：
Patients are advised to expectorate sputum into a sterile container.（建议患者将痰咳入无菌容器中。）