To muff dive, to muff dive is the act of a male or female(lesbian) performing cunnilingus on another female. When the male or female is performing the act of cunnilingus on their partner their mouth is busy therefore it is muffled.
(Suzanne and Amy were discussing their sexual libido and child birth)
Amy:Howard didn’t go down on me like that until after we were married and WOW I wish we had never waited.
Suzanne:Good for you girl. The only reason I let George muff dive is to muffle his damn mouth up for a few hours.