Two insults today –
Forty-guts, vulgar term for a fat man.
Forty-foot, a derisive appellation for a very short person.
Forty-foot, well, that could used to describe me. There must be something especially amusing about the number forty.
There’s also another word for toilet on this page –
Forakers, the closet of decency or house of office.- Term used by the boys at Winchester School.
I was looking up the reason for this, and it turns out Forakers is an old word to refer to part of a field, so their original loo was the field behind the school.
Happily through that search, I found this page with two excellent American insults on it – Foozle meaning fool and Fopdoodle, meaning a silly fellow – http://www.christianregency.com/regcant/A_dictionary_of_slang_jargon_cant-ed%20411.pdf