fix (someone's) little red wagon

Translations
проучить (кого-либо), наказать (кого-либо)
After the prank, his sister told him she would fix his little red wagon.
После розыгрыша сестра сказала ему, что проучит его.
Definitions
To punish, reprimand, or get revenge on someone; to put someone in their place or teach them a lesson, often after they have done something wrong or annoying.
Words
wagon

noun
вагон
fix

verb
чинить
little

adjective
маленький
red

adjective
красный