2 definition by Adisa

Kumbayah is a uniquely African-American contribution to American English.

Kumbayah is a Gullah pronunciation of the phrase "Come by here" (or "come by yah", 'yah' being a West African form of 'here'.)

This word has been turned into an ironic term by overusage and misinterpretation by the mainstream culture. However, it's actually a call to God to visit the singer. "Kumbayah my lord" means 'come by here, my lord".

A derisive term for computer geeks who proffer 3 fundamental beliefs:
1) Microsoft can do no wrong and is right and admirable to pursue dominance by any means necessary.
2) There are NO other viable computing/development platforms.
3) That successful marketing by Microsoft has not influenced their computing/technology choices.

The term "Billion" is a combination of 'Bill' (Bill Gates, Microsoft co-founder and it's most recognizable face) and 'Legion'. So, "billion" = "Bill's Legions." Also, it's a play on the idea that such people eagerly add billions of dollars to Mr. Gates' fortunes.