Similar to how a gaydar is the ability to detect non-heterosexuality, the trapdar is the ability to detect a trap--that is, a male who can be easily mistaken for a female.
<A> That chick's pretty hot, I should ask her out.
<B> Don't. That "chick" is setting off my trapdar.
A Trapartment is either a small, dingy and/or grimy apartment where drugs deals are carried out. Or, a place where not only drugs are carried out but sex for these drugs happens. Some Trapartments aren't always small, but they are almost always dingy.
Esra: Hey gurrrl heyyy, come 2 the trapartment 2nite it's still small but it doesn't smell liketrash for now!
Natashe: Mmhmm gurrl I be down 2 c u soon. U gon hav big CJ there? Heard he got gr8 (insert whatever substance here)
A lap dance from what you suspect to be a pre-op transexual.
Indicators of a trapdance might include failure to remove undergarments, obviously fake breasts, excessive hair, deep voice, or manhands.
Person 1:
"Hey man I think I just got a trapdance. She was grinding on me, but I saw her biceps bulging with delight under her thick arm hair. Then she went to whisper in my ear, and our adam's apples bumped."
The ability to find girls who are complete train wrecks. Usually they are hideously ugly and/or have severe mental problems. They are easy prey and a guarantee hookup.
Max uses his traidar at bars to guarantee he gets some lovin at night.
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.