Referring to the heavy unfashionable winter jacket and patterned mittens Sanders wore to the inauguration of Joe Biden.

Coonery
Action or other behaviour, usually on the part of African Americans, used to reinforce and perpetuate commonly held racial stereotypes about their own community. Could be related to internalised racism and self-hatred. An example would be the stereotype of Unlce Tom or Sambo. Often seen in the Blacksploitation film genre, some rap music, and broadcast TV.

Pejorative term to describe behavior that is seen as unbecoming of African-Americans.

When a African American individual acts in a foolish way