A written job description<span> may state that an employee performs a certain </span>essential function<span>. ... However, if an employer wishes to use a </span>job description<span> as evidence of</span>essential functions<span>, it should in some way </span>identify<span> those </span>functions<span> that the employer believes to be </span>important<span> in accomplishing the purpose of the </span>job<span>.</span>
Means someone or something is very light weight, metaphor
