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1.
The clitoris
Billy: Why are you so happy today, John?
John: Last night, Brittany let me ring the Devil's Doorbell.
Billy: Nice!

-or-

Samantha: You look tired today!
Melissa: I know, I was up all night ringing the Devil's Doorbell.
Samantha: Nice!
by Homo_pirate May 22, 2012
 
2.
See also, Biffins bridge.
Colin: Your looking a bit pale today, mum?

Mum: Your Dad rung the devils doorbell last night.
by Chiccada February 17, 2005