(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"
The act of performing cunnilingus on a female who is particularly larger than average, for example: A fatty, plumper, BBW, or to put it simply; a fat bitch.
Glen: "Man, did you see 'Oral Perversions 53: BBW Edition' on Spice lastnight?"
Doug: "Fuck that shit man, seeing all that chunkylingus makes me wretch!"