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1. of devil: connected with the devil or devil worship

2. evil: extremely cruel or evil

That guy's diabolic; he worships the devil and likes torture.
by Jafje November 14, 2006
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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A crazy underground rapper. He raps with ppl like immortal technique. Beast ass freestyler, too.
beneath the surface
im overheatin your receiver circuits
by unleashin deeper verses
than priests speak in churches
what you preach is worthless
your worship defeaths the purpose
like president bush takin bullets for the secret service
diabolic, a one man brigade
spreadin cancer plague
fistfuckin a pussy's face, holdin a hand grenade
so if i catch you bluffin
faggot, ur less than nuthin
i just had to get that stress of my chest like breast reduction
by tumtum May 05, 2006
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" i fight for the ones who can't fight
and if i lose at least i tried
we are the new diabolic
we are the bitter bucolic"
by elijah apperson March 29, 2005
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