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Small knobbly unerect dick. Usually to describe a person rather than their dick.
Shut up you fuckin knoblet.
by Sulpher Dragon April 22, 2005
A skull having many knob-like protrusions.

A variation of nugget.
Walter's wife in Breaking Bad, has a haggard knoblet.
by Rocco the other white meat. March 21, 2010