killer
adjective
°(slang) Excellent, very good.
"Those are some killer chicken wings, where did you get them?"
noun
°That which kills.
"There’s a killer on the loose."
°That which causes stress or is extremely difficult, especially that which may cause failure at a task.
"''That test was a killer."
synonyms: assassin, murderer, virama, halant more» , vowel killer