the proper way 2 express eating a girl out for one isn't eating anything on the outside but rather lickin the vagina's inside hence lickin in not to be confused with looking in
Michael: so u have sex with her yet?
Ray: nah i ate her out though
Michael: dude its dumb to call it that i prefer lickin in
The process of giving a female oral sex yet soon finding out that she has gone a handfull of days without shaving her genital area. Thus, the feeling as though you have licked a mitten.