ef 

slang for f or fail.

ef, efff, eeff

ef by anon76889 October 5, 2011

ef 

Enby-friend; A non-gender-specific term to refer to someone’s romantic partner.

Helena and her ef are so cute together!

ef by Lainey Doyleson February 6, 2021

Ef 

The word your teacher uses when they were supposed to say f but they said ef

Teacher: johny you got an ef

Ef by MiloKin October 27, 2021

ef 

aefear

ef

ef by :):(:0:/ December 4, 2021

EF ratio 

A man's erect/flaccid ratio. Can be calculated using inches or centimeters, as the ratio will not change.

A penis which is 6 inches while erect and 3 inches while flaccid will result in an EF ratio of 2.

Just cuz your dick is 4 inches while soft as compared to my 2 inch soft dick doesn't mean it's bigger. I have an EF ratio of 4, while yours is 1.5

EF ratio by I M A Dogg March 17, 2009

Ef You See Kay 

The phonetic spelling of the letters used to spell fuck

Usually used to bypass word filters on forums or chat rooms.

I ef you see kay your mom every night.

Ef You See Kay by Billy Boy Dude December 30, 2008

EF-Bomb 

When a greek girl named Effie gets blasted in her face with their man juice on May 29th. Anywhere between 5-15 people.

Wow, I cant wait to Ef-Bomb tonight!

EF-Bomb by Evan25 May 30, 2008