a rip-off of Deathstroke?
Deadpool's name is Wade Wilson and Deathstroke's is Slade Wilson. Plus the same outfit, mastery over guns, and stuff.
lol never noticed till now.
The answer is yes and no. Rob created him and based his design off of Slade, his writer Fabian noticed it so they decided to call him Wade Wilson as a joke. As for the outfit, they couldn't be more different, different color scheme, Deathstroke has one eye, Deathstroke wears armor. Their skill sets are the same both being top class weapons experts and gifted hand to hand fighters who have healing factors, Deathstroke has been praised as a strategic genius while Wade is called insane(fun fact though Wade's plans always work out like some twisted Rube Goldberg machine)
Don't listen to some of these people saying he was a ripoff of Spiderman or Deathstroke. Rob took some inspiration from them but Fabian and Joe Kelly have made it clear Deadpool is his own character. So what some people may call a knock off quickly grew into his own.