Definitions by wbernard731

npo 

Never Pull Out.

It can be used at any time, in any context.

Guy 1: aww man here comes that stalker girl who won't leave you alone. what are you gonna do?!

Guy 2: NPO, son

npo by wbernard731 March 2, 2010

HMD 

Hold My Dick. Used when the environment is not ideal for this type of language.

Guy1: wah wah wah nag nag nag

guy 2: BRO! HMD!

HMD by wbernard731 March 2, 2010