Let me enlighten you! 
Not cool.
Lumberjack beards.
Not cool!
Isla Sorna
Thanks!
Isla Sorna: Not cool.
Nomanisan Island.
If you mean the one in the Incredibles, cool. If the one in Maryland that’s now a peninsula, less cool.
The Green Hornet
Not as cool as the Brown Hornet.
Mirrored Sunglasses?
Cool, on the right person.
Dark socks with sandals.
Dark socks with sandals.
Not cool! Or any socks with sandals!
Barack Obama
Obama’s cool.
Watching Disney animated movies as an adult
Not cool… but not uncool, either. Neutral, I guess.
If I HAVE to choose, I’ll say… cool.
Watching a SpongeBob marathon in your PJs. When you’re over ten.
Oh, not cool. Even my 14-year-old grandson agrees. (I always liked Squidward.)
Garage bands
Cool.
“Electronic Music Producers” (DJs)
OK, I’m getting a paranoid now…
Nick Offerman, Is he cool?
Oh yeah, Offerman is cool, though a little less so without the moustache.
Gauged ears.
Semi-cool
Resurrecting dead threads
Cool… but only if the thread itself is cool.
Binge watching '50s sitcoms.
Cool.
Acoustic bass guitars?
Cool.
The band Styx?
Was cool, became uncool, now ironically cool.
The term “ironically cool”?