Bitchilly......a term for describing lower temperature mornings. Has also been to know to describe ones mood due to lack of sleep. Its known as a Stavingaism.
Wow its bitchilly outside this morning, brrrr.
Yes, Im bitchilly!!! I was up three times during the night, we are out of coffee and now I must go to work.
billy willy is when your dick is so small and unfunctional because the "whizz" (cockney rhyming slang) "billy whizz" = speed has done what it enevitably WILL do to your bulk of your manhood :D