The term 'ATHLETE's jitters' is a phrase used to describe the feeling of nervousness or anxiety experienced by athletes before a competition. This feeling is also known as 'yips', which is a four-letter word that can be found in crosswords. Yips is a term used to describe the involuntary twitching or jerking of a muscle, which is often caused by stress or anxiety. It is a common symptom of ATHLETE's jitters and can affect an ATHLETE's performance.