JG meaning in Community ?

John Stephen Goodman (born June 20, 1952) is an American actor. He played Dan Conner on the ABC television series Roseanne (1988–1997; 2018), for which he won a Golden Globe Award for Best Actor in 1993, and reprised the role in its sequel series The Conners. He is a regular collaborator with the Coen brothers on such films as Raising Arizona (1987), Barton Fink (1991), The Big Lebowski (1998), O Brother, Where Art Thou? (2000), and Inside Llewyn Davis (2013). His voice roles include Pacha in Disney's The Emperor's New Groove franchise (2000), James P. Sullivan in Pixar's Monsters, Inc. franchise (2001–2021), Baloo in The Jungle Book 2 (2003), George Wolfsbottom in Clifford's Really Big Movie (2004), Layton T. Montgomery in Bee Movie (2007) and Eli "Big Daddy" LaBouff in The Princess and the Frog (2009).

His other film performances include lead roles in Always (1989), King Ralph (1991), The Babe (1992), The Flintstones (1994), Blues Brothers 2000 (1998), and 10 Cloverfield Lane (2016), and supporting roles in True Stories (1986), Beyond the Sea (2004), Evan Almighty (2007), Extremely Loud & Incredibly Close (2011), The Artist (2011), Argo (2012), Flight (2012), Trouble with the Curve (2012), The Monuments Men (2014), Trumbo (2015), Patriots Day (2016), and Atomic Blonde (2017).

On television, Goodman has had regular roles on Amazon Studios's Alpha House (2012–2013) and on the first season of HBO's Treme (2010–2011) and has been a frequent host of Saturday Night Live, as well as playing guest roles on series such as Community. He currently stars in the HBO comedy The Righteous Gemstones (2019–present). John Heilpern of Vanity Fair has called him "among our very finest actors".