it is a level 65 blue perk.
It's a perk
it is in it but you'll need a 4 death streak not like cod 4 that you can use it as a perk
when you become level 65 go to perk 1 and choose flamethrower
if in cod 6 make a class with a stinger perk 1 scavenger perk 2 COLD BLOODED and perk 3 watever. equipment use tac insertion.
It means that player had Scavenger perk. You'll see it a lot of times when you watch the kill cam after you've bitten it.
It is a perk which makes your killstreaks require one less kill. e.g You would only need 2 kills in a row to get an RC-XD.
Primary: Famas Dual Mag/ Red Dot Sight Secondary: Any Pistol Semtex Concussion Motion Sensor Perk 1: Flak Jacket Perk 2: Sleight of Hand Perk 3: Marathon
i shows your enemys as red dots on the minimap unless they have cold blooded perk (its basically radar)
To get the pro perks in Black Ops you first have to purchase the perk (obviously, and if you don't know they are 2000 cod points). Then, you will need to complete 3 challenges which are under the perks challenges section and then once the challenges are done you will have to pay more cod points to upgrade the perk.
It is one of the first perks you automatically have, so you might want to rephrase your question.
If you mean the best than here is one for a higher rank Primary-ACR w/red dot Secondary-Spas12 w/grip Equipment-Semtax Special-Flashbang Perk One-Scavenger Perk Two-Stopping Power Perk Three-Ninja or Commando