interjection

An exclamation or filled pause; a word or phrase with no particular grammatical relation to a sentence, often an expression of emotion.

322. The parts of speech which are neither declined nor conjugated, are called by the general name of particles. 323. They are adverbs, prepositions, conjunctions, and interjections.

Some evidence confirming our suspicions that topicalised and dislocated constituents occupy different sentence positions comes from Greenberg (1984). He notes that in colloquial speech the interjection man can occur after dislocated constituents, but not after topicalised constituents: cf. (21) (a) Bill, man, I really hate him (dislocated NP) (21) (b) ^✽Bill, man, I really hate (topicalised NP)

An interruption; something interjected

Mnuchin, asked about climate change in a CNBC interview after his comments about Thunberg, argued there were bigger issues that also needed to be addressed. When a host noted clean air rules as an example of something that might be more urgent, Mnuchin ignored the interjection.