Any of several species of velvet ant in the family Mutillidae, which are known for their painful stings.

(US, Southern US) Any of various unrelated arthropods, including whip scorpions, velvet ants, mantises, wheel bugs, and walking stick insects, that have been erroneously believed to kill livestock by stinging them or being swallowed.

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

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

plural of killer diller

(computing, informal) A program that automatically deletes spam (unsolicited commercial email).

Alternative form of color killer

A murderer. / An animal that kills humans. / (slang) Someone who habitually seduces men.

A murderer who kills two or more victims in a short time in multiple locations.

Sphecius speciosus, a large digger wasp that hunts cicadas.