To accomplish two tasks with only one effort.
To use only one action to complete two tasks.

The only true way to kill two birds with one stone literally is to have the following involved:
1)"Kill" two flightless birds with one very big stone. 2) Use one stone but recover it after each shot until two birds are "killed". 3)Wait until two birds are in close proximity and fire the stone from a bazooka. 4)Meteorite collision with Earth.
I have to go to Olvia's house, and you have to see your friend who is with her, let's kill two birds with one stone by both of us going

We can kill two birds with one stone if we go to walmart and get what you need as i get what i need.
by ddddunit November 27, 2005
To have sex with two women at the same time, and climaxing on their faces. Bird being another term for women, and stone relating to a man's testicles; more importantly the ejaculation.
by Max Well House April 6, 2010
Firing one bullet and killing two people with it.
The criminal's aim was so good that he killed two birds with one stone.
by Longview March 16, 2005
Getting two things done with one action. Not the same as multitasking.
"I decided to get sponsers for my fundraiser && deliver newspapers at the same time"
"Cool. Yu were killing two birds with one stone."
by piiglett. June 15, 2009
To take care of two problems with one action.
"While I was out delivering the pizza, I stopped by the bank so I wouldn't have to later. I was killing two birds with one stone."
by XDavid PolicastroX January 28, 2009
When "Jesus Christ" was away in the desert, his wife (a Himalayan girl he had married after his traveling and teaching in the mountains, they married when he was sixteen or seventeen) and mother of his small children was accosted by sabateurs who told her "Jesus" was dead in order to lure her out and rape her. Roman soldiers led him to her in a dry river bed, where she was then stoned to death in front of him. The first stone, thrown possibly by her rapist, a lout in the Roman mob, killed her instantly. Jesus did not fight his "prosecution" after that, resigned to his fate because he blamed himself. That's the truth as I have been allowed to see. "Two birds with one stone" then the Romans appropriated his religion, making it their own, full of secrets and lies. Setting this example for us all!
When they murdered Christ's wife, the Romans were "killing two birds with one stone"
by Wifey 7643279 January 9, 2021
Cutting your penis in half with a katana and then using the two halves to have sex two small pigeons.
by homoerectus99 October 13, 2008