A phone you do illegal activity on then get rid of.
"Use the Throw Away Phone so the one time don't gaffle you up."
by Ocean G November 16, 2015
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A mistress or mister that is on the down low and is not worthy of a real phone number.
Dude that chick is hot!

Bro shes a throw away phone.
by Novacaine86 April 4, 2010
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