also: ねちこい
i-adjective
persistent; stubborn; obstinate
Describes a person or attitude that is annoyingly tenacious, clinging, or unwilling to let go. Often carries a negative, critical tone.
彼はねちっこくて、一度言い出したら絶対に引かない。
He's so stubborn that once he says something, he never backs down.
あの営業マンはねちっこい勧誘で有名だ。
That salesman is known for his persistent solicitation.