To upset or overturn.--Webster. Originally a seaman's word; but now often heard among landsmen.
·noun An upset or overturn. II. Capsize ·vt & ·vi To upset or overturn, as a vessel or other body. ...
Webster's Dictionary of the English Language
To overturn or reverse. He took his broth till he capsized; he drank till he fell out of his chair. ...
Dictionary of The Vulgar Tongue by Francis Grose
To upset or overturn anything. ...
The Sailor's Word-Book