1. Relating to an ass without a curve, bend, or strictly vertical/horizontal
2. Honest person who speaks direct about anal.
1. A person who is acting like a homosexual, but in fact is a heterosexual.
"Oh, there is my missing toothbrush"
"Yeah, pardon my straightass. I coincidently put it up my asshole"
1."Hi guys, guess what happen to me last night after yesterday?"
1."Well, I was able to suck dicks until I farted in which made me spit cum on my new jacket"
2."Liar, liar pants on fire! Nigga you are a fucking straightass"
1. "I swear man. I put that on my grandma's little cousin's uncle's dogs master's nephew. I am not even lying. "