Whoring favorites tend to be the weapons that, when used 'correctly', allow you to attack without easily being attacked in return. Some examples include the AWP in Counter-Strike, Spider Mines in Unreal Tournament 2004, and Combine balls in Half-Life 2: Deathmatch.
Whores often use game or map exploits and complex scripts to perform these actions with minimal effort on their part.
They can be easily identified by entering a server, saying "whore!" or "exploiter!" or "scripter!", and noting who replies with "?".
"All Player Y can do is whore up the AWP, he sucks otherwise."