When a person makes a mistake or does something embarrassing and attempts to justify it by saying only cool peopledo it.
Example 1:
Man 1: "I cried when I watched Titanic."
Man 2: "You're a pussy."
Man 1: "Hey, only real men cry during Titanic!"
Man 1: "You're just trying to Coolstify yourself."
Example 2:
Man 1: "I just sucked that guy's dick."
Man 2: "Dude, that's gay!"
Man 1: "Only cool guys suck other guy's dicks."
Man 2: "No, you're gay."
Very cool, the most cool, and extremely cool. The word is a hybrid of the English adjective 'cool' and the Italian suffix '-issimo' for 'extremely, most, very'. It is pronounced 'cool-I-see-moh'.
A: Ey yo, Weezee, you dig my pants? Snotty said they was wack.
B: Snotty don't know shit, aight. They're coolissimo!