Flogging a Dead Corpse

 is a unmarked quest in Fallout: New Vegas.

Quick walkthrough
When strolling through Freeside, you may be stopped by a thug near an alleyway, across a Squatter camp. He is showing you a corpse between some dumpsters and makes it clear you are next in line for this fate.

You can handle the situation yourself or let your bodyguard, should you have one, do the dirty work.

You have to kill 3 Freeside thugs, though they are weak and have weak weapons.

Detailed walkthrough
When visiting Freeside, you'll see a destroyed building in front of Mick & Ralph's, in the other side of this building, seeing one Freeside thug waving his hand to signal you to go into an alleyway. You must follow him, and when approaching him, he runs into a nearby alleyway. If you keep on following him, he will stop next to two dumpsters, and show you a corpse, opening conversation with you, saying "Hey look, between the dumpsters there". You must choose one of the options. Any of the choices will turn him hostile, as well as the three Freeside thugs waiting to ambush you at the mouth of the alley. They are relatively weak, and poorly armed.