A lol-cow is a victim of a flame war
who can't help but be milked for lols time and time again. They have a compulsive need to give up as many laughs as possible at their own expense despite themselves.
A good Flame Warrior can turn even the most dignified poster into a lol-cow, dehumanizing them every step of the way. For some unknown reason, the lol-cow cannot break the cycle and regain their humanity.
I wish I could stop checking this forum topic, but the lol cows come back time and time again to be milked.