An iPipe is a pipe that's made out of an iPod. Generally, the bowl will be where the click wheel was and the mouthpiece will be where the headphone jack was, but any way will work.
"Dude my iPipe is the best piece I have ever used...it's so cool"
by Brian Marx May 6, 2006
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The acronym IPIP represents

In

Person
In
Private

It is commonly used when texting, emailing and messaging (see TEMs in urban dictionary) to let a person know that a particular subject can not be discussed via the internet, phone or any other medium other than to be physically in their presence and to have privacy from all others .
Despite the continued efforts of messaging Simeon by Bobo, which were pleading with him to tell her the whole story, Simeon stood firm and said “ this is a serious matter and it would have to be IPIP if I was to tell you anymore”.

Simeon Adams
by Simeon Adams April 21, 2019
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