Holy crap, that's some weapons-grade Sneaking Crap Under the Radar joke, if you could even call it that. Even I'm stumped on how to translate this without it turning into sexual harrassment...

Edit: Just a sidenote, Len is referring to a Thai TV Variety show called "มุขควายเครียด" which revolves around spouting out the dumbest or most absurdly punny jokes, sometimes to the point of mangling the language just to get to the punchline.