when somebody (likley stoned) generally muddles up there words and says a bunch of jiberish. it is called a spequence because it is not a sentence, because it doesnt make sence. it is instead, a sequence of speekings.
it is pronounced speek-wence
aah i just cant get my foo on o mean my shoot ( two variables on shoe/foot) by mixing up shoe and foot he had "done a spequence"