끼부리다 literally means "show talent" but actually it means "flirt". ㄹ 줄 알다 means "know how to do" 나도 끼 부릴 줄 앎 means I also know how to flirt. 앎 is verbal noun of "알다" It is 음슴체 Refer to https://www.italki.com/question/343417