importunate

/ɪmˈpɔːtjʊnət/
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adjective

persistent, especially to the point of annoyance.

persistent, insistent, tenacious, persevering, dogged, unremitting, unrelenting,  tireless, indefatigable, stubborn, intransigent

“I hope that when we go out from this place tonight and we are waylaid by importunate nose-ringed climate change protesters.” (Boris Johnson on Climate activists)