If you do any amount of reading,this is an excellent resource to have on your bookshelf.It is a big,dictionary sized book of 1400 pages,and has over 100,000 listings.It may not have every slang word or saying;but its certainly got a lot and more than that,it has a zillion you have never even heard.I find it fun to just open it up at any page and read away.
Just for fun,that is exacatly what I just did.I randomly opened it at page 377.The first entry was :
"fallen angel"-A defaulter,a bankrupt :Stock Exchange
I thought it meant a prostitute.Then I checked "soiled dove" a term used in the Old West.On page 1111 there it was
"soiled dove"-A high-flying harlot later C19-early C20.
then there's,
"false as my knife"-As with knives,so with false friends--they'll cut me.
Or how about
"fam trip"-A familiarization flight in a new aircraft.
or
"fan in a fin"-A helicopter's 13 tail roters which,since they are shrouded , are known as"fan in fin"
or how's this one;
"false hereafter"-A dress-improver or bustle-used 1890-1900.
Then there's this one,
"family pound"-A family grave.
or
"family hotel"-A prison. 1840-1890 "In a ward with one's pals,Not locked up in a cell."To an old hand like me it's a family hotel".
That should give you an idea of what to expect.I choose only a few of the many entries on this one page;and just imagine what is to be found on the other 1400 pages.