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Twism is when the prefix "tw" is added to a word that has been created, or coined out of the growing use of twitter and the nomanclature that is being created.
You just said, tweetheart and that is a twism.

Have you heard the twism,tweetheart?
by krista pappas May 19, 2009
A combination of a twitch and a spasm.
Dude, your dog is having a twism.
by Jimbo T. Jones February 19, 2009
Shaq's lame record label, an acronym for "The World Is Mine".

Also, what you yell out when you jump up and hang on a lowered rim in the gym, or maybe even the occasional doorframe lintel. Be sure to slap the backboard/wall before landing for full Shaq-ish goodness.
TWIsM records went out of business, which should come as no surprise to anyone who has heard Shaq rap.

When Brandon TWIsM-ed on that double-door's frame, he broke the spring mechanism clean off and had to run away from the vice-principal to avoid being caught.
by Paul.B January 14, 2009
see Twizm
by SlutDogg October 08, 2003