An overweight woman wearing a bikini on the beach or at the pool that should not have been made in a large size in the first place, otherwise known as a "chunkini".
(v.) The improper act of having, or trying to have intercourse with a large woman, typically on a weekend night. Derives from the word chunker. A large woman can be referred to as a chunker.
"Yo bro, lets finish this beer and go out to this party. If I get really drunk tonight I might go chunking"