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1.
The act of sufficating your partner with your vagina while receiving oral sex. This is usually done while the female is stradling her partner's face while on top of him/her.
*cough* *cough* *wheez* "Honey, can you arch up a bit more, you'll smufficate me if you keep grinding on my face like that!"

"Man, I was with this complete freak guy last night, and all he kept begging me for was to smufficate him!"
by Dean the Mean Machine November 06, 2008
 
2.
To smother and sufficate together; at the same time
If I use that blanket, I will smufficate!
by sabbycat June 30, 2009