Disclamer:
!!!NO CURRENT PASSWORDS ALLOWED!!!
Here is a physical password generator, and get a nonbiased dice for it ex. these Dices
Please keep your passwords safe, secure and strong, all passwords shown are, and should be, obsolete!!!!
I'll start
qwerty
password123 
not that I ever used it, but I know people who do 
My personal "embarrassing" password would probably be the "I'm too lazy and just input a single space" 
It should be one you were most embarrassed about
The password was from when I was 21, and smoked the weed!
some of my passwords were listed here which i used long back 
https://nordpass.com/most-common-passwords-list/ ,but keepassxc made my passwords hassle easy
I use Dashlane today, I only have to remember one password at a time, and it's complicated!
If it's only one password, then I can learn it in 15min
I had to change it on my luggage.
I've always been careful of these aspects, fortunately.
But when I joined my current company, my business unit came from the acquisition of a German company. The standard administrative password of an old and dismissed system was geheim (secret in German). After a while it was changed to the new-company-name1 (which is even worst), then new-company-name99 (what an effort...). Finally things changed a lot. It is a big multinational that pays a lot of attention to these aspects and I must admit it is a pleasure to follow their Cybersecurity trainings (and one of them brought me indirectly back to Linux 
).
And the worst part of that is that, many many many other companies took password security too lightly.
Saw once an admin password, it was "secret" -.-
That was at the university I went to, no wonder my password was qwerty.
University is not there anymore, what gives heh
"penguin"
This was the common password used for game servers with friends, mostly for us *nix users to bully Windoze friends into switching 
For proper passwords, I've long had GRCĀ |Ā Ultra High Security Password GeneratorĀ Ā bookmarked for quickly/easily generation/access.
My home desktop password was 1
It is really handy and no one is going to get to my home desktop. Also, there is no layout change issues and it is easy to type ( obviously ).
(myname)x2 i'm sure still a lot of you use that format, its just ummm easy.
I used a female character's name from an old James Bond 007 movie for a while.
Pussy_Galore
C'mon I was much younger back then. 
Oh, I was expecting Octopussy because similar to Octopi. 
F_ck <Wife's Name>!
opensesame
password : I am idiot!
THis password i used for my phone when i was travelling
(no one would accept it for itself that he is idiot) 
That's not embarrassing. That is your duty.
This is a trick, the correct answer is "Wouldn't you like to know" ;p