判断・推量N2
〜っこない
no way... / never...
Structure
V-ます形（語幹）+ っこない
Explanation
Expresses that there is absolutely no possibility; a strong negative speculation in casual speech. Attached to the masu-stem of verbs. A colloquial, emphatic version of はずがない.
Examples
こんなに難しい問題、一人で解けるっこない。
There's no way I can solve such a hard problem alone.
彼はあんなに忙しいから、来られるっこないよ。
He's so busy, there's no way he can come.
Note
っこない is colloquial and usually refers to third persons or impossible things. Similar to わけがない and はずがない.