When you get a girl/guy's number off someone elses phone and start calling/texting them, not doing the work to get it yourself.
"How did you get her number man?!"
"Haha, I just riced it bro"
"Hey what are you doing on my phone?"
"Im ricin' that chicks digits"
"Why don't you ask some chicks for their numbers?"
"Na, i'll just go ricing digits later."