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A surface or feeling so intensely smooth that the poor unfortunate individual shudders, their nerve endings become volatile and the body goes into a trance-like orgasmic state with sometimes (in the extreme) dire effects of paralysis or even death.
Nurse: I have never seen anything like it
Doctor: Indeed, 'tis the worst case of smoothier I have seen in at least 14 hours, he'll not make it through the night.
by Blitzman J September 30, 2010
A combination of smoother and smoothly. When things go smoother than expected and can only be described as having gone smoothier.
Fuck it, I'm a DSM and I made up a new word. Things went smoothier than I expected today.

-DSM Seggie
by IMEI21 November 06, 2011