Wiktionary
a. inseparable; in very close proximity; following closely. adv. Inseparably; in very close proximity.
Usage examples of "like white on rice".
Some guy would goof off one inch and Davenport would be on him like white on rice.
But you're luckyif we had landed in Myanmar, government investigators would have been on you like white on rice, and you could forget about leaving for days, maybe weeks.
You also haven't met any of the FBI types who will doubtless be hanging around like white on rice.
And no matter where you are, Lenny, I'll be on you in spirit, like white on rice!
The FBI had been on the Arab community like white on rice with wiretaps, informants, arrests, and interrogations.
But if you stay around here and start harassing the Soviets, the Feds are going to be on you like white on rice.
If the cops find him here they're on our trail like white on rice.
Jingles was on it like white on rice and nosing it back to Delacroix.
I ordered our Cuban station to get all over them like white on rice, starting six months ago when we started getting sporadic tips of a possible coup.