Instead of saying "cool story bro" try these out:

fatregina:

1) Fascinating Discourse Chum
2) Riveting Fable Comrade
3) Intriguing Anecdote Brethren
4) Perpetuating Argument Colleague
5) Sweet Saga Yo
6) Waste of Time Jerk
7) Spellbinding Reiteration There My Chumly Companion
8) Phantasmagorical Novelization Oh Great One
9) Interesting Intellect Imbecile
10) Trepidating Boar Fetus
11) Ballin’ Gossip dawg!