look up any word, like ratchet:
 
1.
To depart or make haste to another place.
"Dude, I think I should offski about now."
by Ben Wiggins October 14, 2003
 
2.
To leave a place before you are supposed to e.g. a classroom
"can we do the offski's"
by Sam Vennall February 11, 2005