To have drunken sex with a woman while mistakenly referring to her by the name of your pet or your friends pet.
Matt was Berging Lori as he continuously referred to her as Fido while they were having sex doggie style.
1. having an "Aspberger's moment," that is to act like a complete idiot all of the sudden; 2. not making any sense because of your tomfoolery; 3. talking things to literally and acting a fool because of your Aspberger's Syndrome.
Also used as "berging out"
I saw a girl berging out back there, running into the wall and a-wailin.