Final answer:
Les calling his dad a dinosaur is a metaphor for being outdated or unable to adapt, indicative of a generational gap or difference in mindset.
Step-by-step explanation:
In the context of literature, when a character refers to another character as a dinosaur, it's often a metaphorical way to say that the person is outdated or unable to adapt to new ways. Without context on the specific story 'Shabash', it's challenging to provide a definitive answer, but in general, Les might call his dad a dinosaur to express a generational gap or a difference in mindset. This characterization speaks to the themes of change and progress, which are common in stories involving family dynamics.