Chundered is an informal term used to describe vomiting or being sick. There are several synonyms that can be used interchangeably such as toss one's cookies, heave, puke, barf, retch, upchuck, hurl, spew, regurgitate, and throw up. However, the word chundered is commonly used in Australian and British English slang. The term chundered is believed to have originated from an Aboriginal word "judurrpa" which means to vomit. It's considered a humorous way to describe a person who is getting sick. Whether using chundered or any of its synonyms, the message remains the same, to convey the act of expelling stomach contents through the mouth.