a noun used to describe a cute but hectic person, you can use this word when you find someone very cheeky but emotional at the same time. It can also describe a person who is awfully sassy, do not find trouble with a seungkwan because they can bite. Seungkwan is also someone with unresistable cheekbones.
" You are totally Seungkwan, dont work up yourself too much "
" Dont you think you're being a little Seungkwan today. I like it! "
" Since when did you Seungkwan up ? "