Liquid Minded
Implying that a person (older than 14) is not mature due to a statement that they made in replying to you.
Guy1: After we done playing we gonna be real dirty.
Guy2: Agh sick dude why you telling me?
Guy1: . . . mxm. . . Dude why you gotta be so liquid minded?
Guy2: Agh sick dude why you telling me?
Guy1: . . . mxm. . . Dude why you gotta be so liquid minded?