Someone who's a perfectly smooth bastard no matter which way you look at him.
Also works with Spherical nutjob, spherical jackass.
Syntax: Spherical
cuss-word
History: Often attributed to the eccentric
Swiss Astronomer Fritz Zwicky, who used to refer to fellow astronomers at the Mt. Wilson Observatory as Spherical Bastards. "Because", in his words, "they were bastards, when looked at from any side".
Source: dynamical-systems.org/zwicky/Zwicky-e.html