In order of
1)A saying that means to be on to something or close to something.
2)White person getting some Asian sucky-sucky-five-dollar
3)To be correct
Some people think it a slightly racial term because in actuality, rice is brown and is stripped of its protein and converted to dog food. So I guess people think that it means "White is Right!" or something.
Those Trailerpark Mcgees we're in a hootin' and hoohaw, Tuesday HooHaw hootenannie-hodown like white on rice when the Methman came by with more Xtacy and Meth and Crack.
Let me get a HooHaw Tuesday!!!
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.
asian man engaged in sexual intercourse with a white woman
Ming was on Jolene like white on rice.
a white man engaged in sexual intercourse with an asian woman
Joe was on Ming like white on rice.