The function of interjection is to express emotions or feelings. Usually it is a word or phrase.
In the line "the oversize nose, the hollow look", the speaker is using metaphors.
Metaphor is a figure of speech that makes a comparison between two objects that seem unrelated in order to intensify or exaggerate the quality of one of them in order to make a stronger effect on the reader.
When the speaker characterizes nose as "oversize", he gives it a characteristic which is normally used to describe clothes. As for the expression "hollow look", one may use the word "hollow" to speak about surfaces which are uneven, with curves, hollowed-out, so to say.
Thus, with the usage of these two metaphors, the speaker creates a more dramatic effect.
