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1.
A word spawned from the NBC sitcom Scrubs. Bluncle is a contraction of black and uncle usually signifying when a black man becomes a "pseudo-uncle" to a white friend's child.
"Did you hear? J.D.'s friend Turk is going to be a Bluncle!"
by Bowser-Sensei November 01, 2007
 
2.
A Black man that has a white niece or nephew.
BBN - "My white wife's sista just had a baby boy"
Snowflake - "Congratulations on being a Bluncle"
by Big Black & Nasty March 25, 2008
 
3.
a black, or to be politically correct, African American uncle, as used in Scrubs by JD to describe Turk's relationship to his soon-to-be-born child .
Chaz says to Skyler: Is that your bluncle, the African American guy who knocked up your aunt ?
by Mago <3 November 02, 2007