killer diller

Perhaps a reduplicative rhyme for killer.

killer diller (plural killer dillers)

1. (slang) A person or thing that is astonishing, outstanding, or exciting.

killer diller (comparative more killer diller, superlative most killer diller)

1. (slang) Excellent, terrific, outstanding, or wonderful.

• For quotations using this term, see Citations:killer diller.