cowboy killer

all hat and no cowboy

Full of big talk but lacking action, power, or substance; pretentious.

cowboy shower

A simple shower in a horse trailer's living area to remove the dirt and grime associated with working around livestock.

cowboy up

To put on a more heterosexual manner, in order to fit in.

killer instinct

The natural inclination to aggressively achieve dominance or success in a particular endeavor.

silent killer

A disease experienced by someone who is not symptomatic.

thrill killer

A murderer who is motivated by a strong personal desire to have a very exciting experience.