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4.
noun

1. The formal term given for any meal eaten past 4 PM., between typically lunch and dinner times.

2. A portmanteau of "lunch" and "dinner".
"I'm so busy at work I didn't have time to eat this burger for lunch! I think I'm going to save it for dunch."
by J.O.G. January 19, 2012
 
1.
noun.

Dunch refers to a meal enjoyed subsequent to lunch but prior to dinner.

Dunch should be distinguished from linner, another meal occurring in the post-lunch, pre-dinner interval, in that dunch occurs after linner, closer to dinner time.

Thus, the socially accepted norm with regard to afternoon eating agendas comprises the following progression of meals:

Lunch --> Linner --> Dunch --> Dinner
His large stature requires that he eat lunch, dunch, and dinner!
by Willow October 12, 2007
 
2.
An abnormally time-consuming, large, pasty and often painful bowel movement. As a general rule, taking a dunch requires most of one's lunch break to pass loaf or loaves and finish the paperwork.
Q: "...Hey Bob, I'm going to that sushi joint with the girls from accounting. You wanna come?"

A: "...I'd love to but I have to take a horrendous dunch." I'll see you at the 3:00 meeting."
by JEUNT November 11, 2009
 
3.
Dinner-Lunch
A meal between lunch and dinner
I'm glad I had dunch, because dinner was very unappetizing!
by fiercegiraffe August 03, 2009
 
5.
A male or female individual who frequently partakes in promiscuous, slutty, behavior.
Noun form:
Me: "That chick is a total dunch man, I would be careful..."
Friend: "Are you kidding? Easy pickings! HEYOOOOO!"

Adjective form:
"Wow, Rebecca has been acting pretty dunchy lately. Apparently she got a cleveland steamer from Roger!"
by TheW1tchDoctor October 01, 2011
 
6.
when a girl is giving head, and the guy vomits.
oh my god they totally dunched last night, it was nasty!
by marshaaaaa77 August 17, 2011
 
7.
The groin region between front and back, similar to a taint.
I was having a good day, until I walked in on Chris and Colleen smashing dunch in the tool shed.

Justin Hauser was being a dunch, so I gave him a punch in the dunch.
by Trent, from Bishop May 06, 2011