You can "send someone up" by imitiating/mimicing them (or a characteristic of their personality) by imitating their speech, or mannerisms in an exaggerated manner in order to invite laughter at their expense. If you "send yourself up" you behave in a manner that invites laughter at your own expense. Charlie Chaplin's wonderful send up/satirising of Adolph Hitler in "The Great Dictator" is a classic example of a send up.

I have never encountered the term "disobliging" being used in the context of this thread either in Ireland, or here in Cornwall,UK.

"Four letter words" are commonly referred to as "rude words" in both Ireland and the UK.

Rude is also used as a positive description of a person's appearance such as saying that someone "is looking rudely healthy" (in very good health)

Here is my list, and apologies if I've accidentally repeated one from an earlier posting !!

Salacious
Explicit
Obscene
Grotty
Sleazy
Tasteless
"Close to the bone"

XX