Top definition
Tachy is short for ventricular tachycardia, which is a a very rapid heart beat and a form of cardiac arrest.
From Firefly:
Doctor 1 : He's going tachy!
Doctor Tam : Ya, but his heart is beating.
by Dather May 17, 2009
Get the mug
Get a Tachy mug for your buddy Vivek.
buy the domain for your cat site