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1.
To splong is to break the social rules, defined by a community.
This can result in a ban from the community and being ignored and repelled by community members.
"He's splonging again! What a mediawhore! Let's kick him in the ass!"
by Ano Nymous February 16, 2008
 
2.
A crude smoking device resembling a bong into which spliffs are placed.{hybrid of spliff and bong)
by antiplod May 26, 2003
 
3.
A half and half mixture of marijuana and tabacco which is packed into a bong.
If a large enough hit is taken, the result is an incredibly light feeling sensation
yoo man hurry up and pack that splong!!
by gooboo November 08, 2009
 
4.
splong splong splong splong
splong!!!! splong!!!!
by Uncle Bert March 10, 2004
 
5.
an action word -- somewhere between splat and sprong.
Splong! Pow! Splat! Splong!
by splong March 10, 2003