Freedough
Freedough, Freedo, or the plural of either (Freedoughs and Freedo's) are nouns used to mean doughnuts (or donuts) consumed in a free period.
Dude: "Hey man, where you off - we not got Physics?"
Duder: "Na, I'm just off to Budgens to get some freedoughs."
Duder: "Na, I'm just off to Budgens to get some freedoughs."