Terrible; awful. Anything defined as "cool and trendy" is actually the opposite. Internet tough guys love things that are cool and trendy, as these things help them feel slightly less gay. However, even things that are cool and trendy don't hide the fat of the fat lion.
Sister to your dad or mom, has piercings and/or tattoos. Plays video games and teachers you about things your parents would rather wish you wouldnt just yet.
Oh man! You are my Cool Aunt! You obviously got all the Cool genes, which is why my mom/dad is such a tool!