Dominas, you are partly right! It WAS Rowdy Roddy Piper. But the movie was "They Live", a horrible 80‘s (1988 to be exact) B-movie with the very worst acting and soundtrack ever, that decade.
"I have come here to do two things: Chew bubble gum, and kick ***. I am all out of bubble gum!" This line was ad libbed on the spot by Piper.
There are some other winners in that flick, but for the life of me I can‘t remember them verbatim.
One of the classic scenes, though, is his 10 minute long brawl ... with his FRIEND ... just to get his buddy to try on a pair of special sunglasses that let you see the aliens. Clearly, this was just to showcase the fact that he‘s a wrestler. The other actor was Keith David, and part of the fight was real. It was intended to last only a minute, but John Carpenter liked the improv version and kept it in the final cut.
It‘s funny, while few people admit to having watched this, a lot of people have seen it and can recite that line or know the plot. It‘s a cult classic, as horrible as it is.
Another cult classic I recommend for some real zingers is "The Adventures of Buckaroo Bonzai (Across the Eighth Dimension)" (1984). It stars Peter Weller (Robocop, Naked Lunch), John Lithgow (Third Rock from the Sun), Christopher Lloyd (Back to the Future), amd Jeff Goldblum (The Fly, Jurassic Park). Weller plays Bonzai, a scientist, surgeon, rock star who discovers the portal to the eighth dimension... aliens and battles follow.