Definitions by The Rerturn of Light Joker

shoot blanks 

to be infertile and unlikely to impregnate a woman by having sex with her (from a term used to describe the firing a gun loaded with bullets designed not do harm to the target)

She never realized he was shooting blanks until he hesitated about buying condoms. (example of shoot blanks)

shoot blanks by The Rerturn of Light Joker June 5, 2009

turn tail 

to run away in fear (and run is often added although this essentially makes it redundant)

Don't turn tail when you have a huge turnout like that.

turn tail by The Rerturn of Light Joker November 2, 2008