British slang from the 1950s thought to have originated in East Anglia and meaning a lesbian. The word oonch is thought to have derived from the dialect pronunciation of 'conch' and was used as a slang name for the vagina due to the resemblance of the opening of the female genitalia to the opening of a conch shell. Thus a lesbian became an oonch fancier.
"Ah! I wouldn't mind a bit of that!"
"Forget it boy! She's an oonch fancier."
Idle fancies are the things that you do when you are doing nothing at all. Examples include smoking weed, eating junk food, and excessive masturbation.
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.