Top Definition
A combination of rohypnol and laxative, secreted into someone's drink in order to make them simultaneously:

a) Pass out
b) Evacuate their bowels

Usually employed in jest, a Roofylax is also occasionally used as a pre-cursor to scat-fetish rape. In even rarer instances, it is self administered in a public environment as part of an exhibitionist fetish fantasy
1. "I have just roofy-laxed you. Tomorrow morning you will wake up in a strange environment, covered in your own poo. And so will I."

2. "I have just roofylaxed myself. Here are my house keys and a Sleigh Bell CD. Take me home."
by roofy-lax November 23, 2010

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