"an alice" is a female that leads a male to think she wants to bang but doesnt bang, "an alice" will normally get their victims erect and at times will even let the male touch her, however the alice wil never, i repeat NEVER bang.
there are a few reasons why the alice wont bang, the main one is that she is scared of the dick as she is normally a virgin, the second reason being that she doesnt want to ruin her cute, pure, virgin girl reputation to be shattered.
some beleive that "an alice" actually really wants to have sex and that she is more hormone than most girls but will still not bang
the act of putting an incoming call on silent when you know its your best friend on the other end desperate for help. After pulling an Alice, you delete the call data and pretend you never got the call. Later when you see your friend in jail after two days, you tell them you'll be there for them no matter what.