The Meaning of EFF
You have found the definitive source for the meaning of EFF. This page contains all the definitions of EFF, crowd sourced, moderated and curated by real people who care about the true definitions of EFF.
The Top Definition of EFF
The most popular meaning of EFF is: Fuck
What Other Meanings of EFF Are There?
There are no other definitions for EFF at this time. Add your own definition of EFF.
What is EFF?
EFF is Fuck
The definition of EFF is "Fuck".
The meaning of EFF
EFF means Fuck.
Now you understand the definition of EFF - EFF means "Fuck".
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What does EFF mean? EFF is an acronym, abbreviation or slang word that is explained above. If you ever forget what EFF means, just come back to Slang.org and we'll define any acronym you need help with.