Usually used to refer to someone who is clownish, foolish or a nerd.
Example 1.
Guy 1: âIâm so strong, I beat up Steveâ
Guy2: âhear dookie, you got smackedâ
Example 2.
Guy 1: âbro I got violated todayâ
Guy 2: âyeah I heard g, whyâs dookie lying on your name?â