the act of sending or receiving an instant message.

verb- to instant message

Stands for In My Dialect.

injecting madame's derriere

IMDS or Internal Motion Dynamics in Security is a descriptive acronym, defined as the North-South and East-West traversal of data in a network when compromised by a hacker (someone who has smuna). Recently a large sports device manufacturer was hacked by a smuna sufferer and the hacker deployed retarded semen syndrome into the network, utilising IMDS techniques. It is clear that the person who coined the North-South and East-West paradigms, rather than the correct acronym, suffers from smuna as well and should be shot.