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:
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."
Steve is so annoying, I'm going to dunch him when I see him later.
Dude, shut up or I'm going to dunch you into tomorrow.
I'm a dick? Yeah, you're a dick and I'm going to punch you in the face because you're a dick. Oh you're gonna dunch me? Yeah bro, I'm gonna dunch you in your full body dick and then I'm going to go fuck your girl.