insist on (also insist upon) [phrasal verb]
1 insist on/upon (something) or insist on/upon doing (something) : to say or show that you believe that something is necessary or very important
My source insisted on anonymity.
She insists on doing everything her own way.
They adamantly insisted upon (their) being included in the meeting.
2 insist on/upon doing (something) informal : to continue doing (something that other people think is annoying or unimportant)
The people sitting next to us insisted on talking during the entire movie.
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Main Entry: ↑insist
Useful english dictionary. 2012.