Entry in progress—B.P.
 
 
Wiktionary
Adjective
like white on rice (not comparable)
1. Inseparable; in very close proximity; following closely.
 
Adverb
like white on rice (not comparable)
1. Inseparably; in very close proximity.
I’m going to stick to you like white on rice.
 
Quotations
Ike & Tina Turner, Baby Get It On (song)
“Now you’re the finest girl I ever saw in my life
I want to stick to you like white on rice “
   
UsingEnglish.com
Idiom Definitions for ‘Like white on rice’
If you do something like white on rice, you do it very closely: When Bob found out I had front row tickets for the concert, he stuck to me like white on rice.
 
Urban Dictionary
white on rice
To be on or close to something. 
the word does not carry any racist connotations, and refers strictly to the foodstuff “rice”, which is in fact entirely white.
When the welfare cheque came, they were on that crack dealer like white on rice.
by poobugs Nov 27, 2003
 
Google Books
Cassell’s Dictionary of Slang
By Jonathon Green
Edition: 2, revised
Published by Sterling Publishing Company, Inc.
2005
Pg. 881:
like white on rice adv. (also like gravy on rice)[1930s+](US Black/P.R.) very closely. [rice is white itself]
     
Google Books
American Speech
By American Dialect Society, JSTOR (Organization), Project Muse, Duke University, HighWire Press
Published by Duke University Press for the American Dialect Society, 1938
Item notes: v. 13
Pg. 4:
‘He got all over me, like the white on rice,’ that is, he scolded me as thoroughly as the color of white covers rice      
 
Google Books
‘New world a-coming’: inside black America
By Roi Ottley
Boston, MA: Houghton Mifflin
1943
Pg. 258:
By and large they are cut from the same college-bred cloth, and although temperamentally, sharply vivid differences exist among them, as to objectives they are as close as white on rice.
     
Google Books
Iron City: a novel
By Lloyd Louis Brown
New York, NY: Masses & Mainstream
1951
Pg. 144:
But then the marshals were all over me like white on rice and I couldn’t see anything. I’m telling you it was really something!   
 
Google Books
The Heat’s On
By Chester B. Himes
New York, NY: G. P. Putnam’s Sons
1966
Pg. 126:
It fitted like white on rice.
 
Google Books
The Decline of the West
By David Caute
New York, NY: Macmillan
1966
Pg. 456:
“A nigger get smart with me I’ll be on him like white on rice…”
     
Google News Archive
7 June 1966, St. Petersburg (FL) Times, “Mississippi’s Vocabulary of Violence” by Frank Trippett (Newsweek Magazine), pg. 2A, col. 4:
HE HAD listened carefully. Mississippi’s vocabulary of violence is varied and old. Almost before he learns to spell the words, a white Mississippi boy masters the braggadocio of racial conflict (“A nigger get smart with me I’ll be on him like white on rice and turn that nigger every way but loose”), and he utters these words as clarion proof of his masculinity.
     
Google Books
Tell Me How Long the Train’s Been Gone
By James Baldwin
New York, NY: Dial Press
1968
Pg. 401:
And I was just going to stay real close to him, like white on rice.
 
7 November 1976, Washington (DC) Post,  “Taking a Lesson From The Good Old Boys; The election of Jimmy Carter brings to center stage that uniquely Southern creature, the Good Old Boy, or Goodoboy” by Clarke J. “Bubba” Stallworth, city editor of the Birmingham (AL) News, pg. 93:
A Goodoboy doesn’t get mad often, but when he does, he will knock you winding.  If he says: “I’ll be on you like a duck on a Junebug,” or “like white in rice,” or “like ugly on a ape” look out.
   
Google News Archive
16 April 1979, Pittsburgh (PA) Post-Gazette, pg. 10, col. 3:
It has been a practice in Allegheny County for Mr. Coll to stick by his “city’s finest” like white on rice no matter what the situation.
 
(LITERATURE ONLINE)
Cliff, Michelle.:  A Visit from Mr. Botha [from The Land of Look Behind: prose and poetry (1985), Firebrand Books]

1       Perhaps, he thinks, they could use some advice
2       Before the Black folks are all over them
3       like white on rice.