a reduced or condensed version of the two common jibes "spaz" and "clarrt", both of which are also shortened forms of insults. Spaz being the shortened version of spastic. Clarrt being the short for of razzclot (razz clot being the Jamaican
name forthe chunky part of menstral blood).
Spazzclarrt is used by clever
people who are talking to white-wide-boys-who-think-they're-black to take the piss by introducing a clearly
stupid new piece of urban vocabulary in the hope it
will be used in the presence of some real bad ass mother fucker, thereby causing said wannabe white wide
boy to be revealed for the numpty he / she is and leading to their ejection from the group.