1 definition by BritonGuy
AC Friends, a popular online forum where people in pikachu costumes attempt to access your rear portal, occasionally interluded by discussion and boobs.
"I went to ACF this morning and 5 trolls in pikachu costumes tried to piitb, but I had an insightful discussion and saw boobs so it's not a total loss."
by BritonGuy March 3, 2008