2 definitions by mjisagenius

Top Definition
Is said to derive from the practice of putting one's toungue to their cheek to keep from laughing.

Today it often means that someone is kidding or joking.
An expression can indicate that the writer is using them tongue-in-cheek.
作者 mjisagenius 2005年5月14日
acronym for the name secret internet fatty
wow there are a lot of sifs on myspace
作者 mjisagenius 2005年7月17日


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