jock itch 
noun [mass noun] North American informal
A fungal infection of the groin area.Ringworm of the groin is called tinea cruris or jock itch....
- Also called tinea cruris, jock itch is closely related to other skin conditions with similar names.
- There are several common superficial fungal infections and jock itch is one of them.
Origin
1970s: jock from jockstrap.
- no-touch
- notoungulate
- notour
- not out
- not pay someone any mind
- not playing with a full deck
- not proven
- not put it past someone
- not quite
- not quite the thing
- Notre Dame
- not right in the head
- no-trumper
- no trumps
- not see further than one's (or the end of one's) nose
- not-seeing
- not see someone for dust
- not-self
- not sleep (or get) a wink (or not get a wink of sleep)
- not so dusty
- not someone's day
- not someone's idea of
- not so much —— as ——
- not stand (or have) an earthly
- not stand the ghost of a chance