English version

spitball

From Longman Dictionary of Contemporary Englishspitballspit‧ball /ˈspɪtbɔːl $ -bɒːl/ noun [countable] American English  a small piece of paper that children roll into a ball and then spit or throw at each other
Examples from the Corpus
spitballMy memos are spitballs in the face of the faceless monolith where I work.The Operations students - the field men - are called spitballs around here.I checked around for spitballs and paper wads.The other buildings are schoolrooms and a gymnasium for the spitballs and gut-men.Anna said they are the ones who score low grades and throw spitballs in class.
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