ner
Ner (interjection) means a mocking exclamation used to gloat over someone else's mistake or misfortune. Example: “Ner, told you that wouldn't work!" he laughed.”
How to use ner
Learner’s notesIn plain EnglishA childish, teasing sound made when gloating or disagreeing with someone.
Very informal and playground-ish; rarely used in adult or written contexts.
Fill the gap
Can you complete this real example?
"_____, told you that wouldn't work!" he laughed.
Etymology
An imitative sound, related to the longer, sing-song taunt "neener."