light a candle 

A euphemism for killing somebody. Used by gangs.

Derives from the christian practice of lighting candles at church to pray for somebody when they die.

Party host: "Get out of my house now, Ron!"

Ron: "I'm gonna call my boys from the Latin Kings and they're gonna light a candle for your ass!"

Party host: "You don't even know anybody in the Latin Kings, Ron. They wouldn't stick up for your punk ass."

light a candle by Russ December 6, 2006

Can't light a birthday candle with a blowtorch 

Idiom. Used to describe a person's lack of intelligence or inability to perform/achieve a simple task.

Is it any surprise how badly he did? That idiot can't light a birthday candle with a blowtorch.

Can't light a birthday candle with a blowtorch by Catfish Baruni June 16, 2016