Whatnot/ˈwʌtnɑːt/ Definition 1 of 2Pro Tip 1/3Informal Usage Used in casual conversations rather than formal writing or speeches. Just pack some snacks, drinks, and whatnot for the road trip. Pro Tip 2/3Vague Listing Use when you want to imply there are more items without listing them all. I need to do laundry, clean up, and whatnot this weekend. Pro Tip 3/3Similar Items Connects items of a similar nature; don't use for unrelated things. We'll discuss budgets, marketing strategies, and whatnot.