spoilt ballot papers

studious--spending a lot of time studying and reading
a quiet, studious young man

Biggs' son, Michael Biggs, said his father was "over the moon" that he had been released on the eve of his 80th birthday.
over the moon---BrE informal very happy

Most of the gang, including Biggs, were soon picked up in a massive manhunt after police discovered fingerprints at a farmhouse hideout where the robbers had holed up to split their spoils.
spoils n stolen goods
The thieves divided up the spoils.

If someone spoils their vote, they write something illegal on their voting paper, usually as a protest about the election, and their vote is not accepted. (BRIT)
They had broadcast calls for voters to spoil their ballot papers...
= deface
spoiled ballot papers

deface v [Tn] spoil the appearance or legibility of (sth) by marking or damaging the surface
Don't deface library books.

Don't spoil your appetite by eating sweets between meals.



spoils system (esp US) system by which important public positions are given to supporters of the political party that wins power