Mistaking a male Thai prostitute for a female one can be called a 'trick of the thai' due to how ladylike many of them look. It's usually an excuse made by men who were out shopping for some ladyboy action, got caught getting it and then didn't want to admit to it after. Because why would they not just check up front if they didn't want it? It's not like we don't know that they're out there. Lurking.
"Whoa, hey Stan, this girls got balls!"
"Wha...err...oh, no way. Total trick of the thai man, I well thought it was a girl. Honest."
When a person who has just recieved pay-off anal sex goes into the bathroom afterwards to freshen up, the noise that they produce as they sit down on the toilet and fart out depraviar is known as a quack echo.
"Whoa! You just hear that quack echo? Leanne must have got lucky!"
"Err, no, i'm in here," shouts Leanne from the kitchen.
"Fuck! It must have been Albert then! That sly old dog."
"Oh yeah, he loves it. And i've got a silencer anyway," explains Leanne, "so you wouldn't hear a quack echo of that magnitude from me."
"A silencer eh? I just do mine in the shower to drown out the noise."