1) concrete n.: One who is excellent at debating
2) SLANGconcrete n.: Used to describe one who masturbates in NSFW speech where the term masturbator is not permitted.
1) Historian: Lincoln is my favorite president. He was a master debater.
2) Johnathon is always twitching and he sounds like a pervert.
The boss is coming! I think he's a mastur-... master debater.