Any ever-changing job could refer to a job where the duties and responsibilities change frequently. More context would help. This dictionary lists some of common collocations for "glance": http://www.macmillandictionary.com/us/dictionary/american/glance_2 Phrasal verbs are sometimes idioms, but certainly not always. For example, in "My boss chewed me out for being late", "to chew someone out" is both a phrasal verb and an idiom. In "I threw out the spoiled food", "to throw something out" is just a phrasal verb. The more natural-sounding question would be "Are phrasal verbs considered idioms."

1) An "ever-changing" job means that new things are likely to happen often 2) Forlorn 3) They're more like "colloquial sayings" than idioms 4) I would say, "Are phrasal verbs considered to be idioms?"

1. Could also mean someone who can't hold a job and continually changes to a new one depending on how it is used. 2. She glanced at my boots tracking in mud from outside. We shared a glance as the man approached us. A glance is quick and often used in past tense when it's a verb like the first one. A forlorn glance and my second example use it as a noun.