What does ‘Chunder’ mean?

Not a wonderfully melodic word, ‘chunder’ is part and parcel of British slang terms. Meaning ‘to vomit’ or ‘to be sick’, ‘chunder’ is almost always used in correlation with drunken nights, or being hugely ill and sick.

For example, ‘I ate a bad pizza last night after too many drinks and chundered in the street.’