The word has a couple of meanings depending on the context in which it is used.
1. It is a word used to say fast.
It is believed that the word is derived from the English word speed.
e.g. “etsa ka spiet.” – “do it fast./do it with speed.”
2. The word can also be used to say bluff.
“These young boys like to spiet on social media networks.”
3. The word can also be used to say fight.