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1.
a dolphin with an abnormal backside being that of a scrotum
In the underground lair at Sea World, many porps live among the failed whale riders.
by wahoodan September 26, 2007
 
2.
A mysterious dolphin-like creature that likes to inhabit low lying areas such as bathroom stalls as well as walls, stairs, floors, money, or even in some cases human beings. These strange beings are usually written in Sharpie or some other form of scribe. Very often the word Porp is seen in question form (Porp?). Originated in the Western Pennsylvania area.
Wow, did you happen to see that enormous Porp? in the bathroom this morning?
by PorpyMcPorpster April 30, 2010
 
3.
To question the factual integrity of a statement made by another person and require a response from them of either: "Porp" if the statement is in fact true or any other word if the statement wasn't true.

Failure to respond with 100% honesty will result in death of one's grandmother, as Porp is derived from the Cantonese word for grandmother. Thus, the stakes are high and you should consider very carefully the implications of porp-lying

Generally used when there is a hint of disbelief about the story/statement. Similar to calling out someone on a bluff.
Steve "I just made out with that blonde bird at the bar"
Dan "Porp?"
Steve "Porp"
Dan "Wow, well done bro"

OR (if steve was lying)

Steve "I just made out with that blonde bird at the bar"
Dan "Porp?"
Steve "Nah but I knew she wanted to"
Dan "I knew she was outta your league"
by bentise July 08, 2012
 
4.
belly button lint
i wore a wool sweater and my belly button was full of porp.
by littlestspoon November 18, 2009
 
5.
paper or plastic?
question: paper or plastic? aka porp?
answer: i miss u too....

thanks for the sweet ride! <3
by lgal October 16, 2010
 
6.
A very cute and sweet person. Big eyes, small nose. Not cute in that "Care Bear" kind of way, but smart and alert.
Look at that sweet porp! She's named Porpie!
by Mark Sottilaro May 30, 2003
 
7.
when a female has her undergrments showing in public without her knowledge(or so she says)
man, keeley porps way too much, next time i see her thong hanging out im gonna puke.
by F-Bert February 26, 2004