<Li> Da Bears: Slang nickname given to the Chicago Bears made popular by the Bill Swerski's Superfans sketches of the early 1990s on Saturday Night Live . Sometimes used to retroactively refer to the 1985 Bears . </Li> <Li> The Deadskins: Given to the Washington Redskins squads under Daniel Snyder ownership for the team's poor performances, particularly during the 2000s . </Li> <Li> Dirty Birds: The 1998 Atlanta Falcons (but is still a nickname for the Falcons). The name originates from an end zone dance started by Jamal Anderson that was adopted by all the players upon scoring . </Li> <Li> Doomsday Defense: The 1970s Dallas Cowboys defensive team . Doomsday I, the unit that led the Cowboys to victory in Super Bowl VI, was anchored by future Pro Football Hall of Fame members Herb Adderley, Bob Lilly, and Mel Renfro, while Doomsday II, which spearheaded the drive to the title in Super Bowl XII, featured Hall of Famer Randy White and fellow defensive linemen Harvey Martin and Ed "Too Tall" Jones . </Li>

What nfl team is called the dirty birds