Colitas, "Little Tails", or its slang, "Little Buds".
On a dark desert highway, cool wind in my hair, warm smell of colitas, rising up through the air...
This part of the lyrics of the song "Hotel California", by the Eagles, brought on curiosity about the word, as the bigger quest for understanding the entire song itself has met with as many "ideas" as to its meaning... but...

The word "colitas" means literally, "Little Tails", thus use of the slang, "colitas", (as referenced in the song) meaning the burning of little marijuana 'tails/buds'.

NOTES:
Literal Meaning is "little tails"
Slang meanings as follows...
1. End buds of the marijuana plant.
2. Has been used to reference a part of the female anatomy, (use your imagination)
3. A person's butt.
Reference material for my definition was confirmed from Eagles management, as follows:
Irving Azoff a manager for the group: during the writing of the song 'Hotel California' by Messrs. Henley and Frey, the word `colitas' was translated for them by their Mexican-American road manager as 'little buds.
1. warm smell of colitas rising up through the air.
2. She has a hot colita.
3. Get your colita over here.
by Webserf January 02, 2007
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A wonderful pine smelling canabis that is grown in the mountains of Northern California. When smoked it gives the warm smell of christmas trees. The buds are long and very clean. Some of the best weed I have ever had the pleasure of smoking. It had a very strong level of THC and gave a powerful buzz. Back in "78" it was a hot comodity don't even know if it is still around.
Eagles tune "Hotel California" On a dark desert highway cool wind in my hair. Warm smell of "Colitas" rising up through the air.
by BigbbbbB June 10, 2006
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is a word used in the song "Hotel California". Its a Spanish word for "Little Tails" and that is in refernce to the buds of marijuana plant.
"...warm smell of colitas rising up through the air..."
by natetherebel December 08, 2007
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The Eagles are not saying 'colitas'. They are saying "Goleta's" - a town on the Southern California coast "The warm smell of Goleta's rising in the air".

Don't believe everything you read on lyrics websites.

per wikipedia: Goleta ( /ɡəˈliːtə/; Spanish: ɡoˈleta, "schooner") is a city in southern Santa Barbara County, California, USA. It was incorporated as a city in 2002, after a long period as the largest unincorporated, populated area in the county. As of the 2000 census, the Census-designated place (CDP) had a total population of 55,204, however, a significant portion of the census territory of 2000 did not incorporate into the new city. The population was 29,888 at the 2010 census.
It is known for being near the University of California, Santa Barbara campus, although the CDP of Isla Vista is closer.
The warm smell of Goleta's rising in the air. Not 'colitas'
by olderguy September 22, 2011
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made up word from the eagles, can mean either happiness or even contentness
I feel such colitas around me
by george September 24, 2004
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