The region betwixt one's scrotum and anus that prevents one from defecating on one's testicles.

Name for someone who you really really despise
Man my dilback is itching, it might could use a little gold-bond.

That guy likes to front like he's a pimp but hes really just a dilback.
by Rem March 29, 2005
5 Words related to dilback
Means a gentleman having a penis on your back and eventually in the same gentleman's ass. The phrase is referencing a dildo (dil) as the penis.
You are a total "Dilback" ie you are a total buttfuck or homosexual.
by Dilback August 29, 2009

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