Cillionaire 

a person who is a crypto millionaire

To become a cillionaire, I am using the Binance app now.

Cillionaire by bernadizonjavier April 6, 2022

killionaire 

In Halo 3, getting 10 kills within four seconds of each other. It is the best medal of its kind. Yes, there have been legitimate killionaires.

To get a killionaire you need a shotgun, a BR, and lots of luck.

killionaire by Jason Brandt January 16, 2008

Thirty Thousand Dollar Millionaire 

A kid who gets his first adult job making thirty thousand a year and thinks he's a fucking millionaire. They usually lease a Lexus cause they can't afford the BMW or Mercedes and generally treat restaurant servers like crap.

"Look at that thirty thousand dollar millionaire snap his fingers at me. He drinks Veuve and acts like it's Cristal. I wonder if he knows I make eighty thousand a year waiting tables."

Thirty Thousand Dollar Millionaire by vinosnob March 19, 2006

Twopence ha'penny millionaire 

A person who pretends to have millions of pounds in the bank, but actually struggles to find a penny to scratch their ass with (A twopence halfpenny is the equivalent of pound sterling 2.5pence).

Usually walks around in fake designer clothes/clutching an imitation designer bag. Alternatively, they may have one genuine designer item with which they parade around with consistently. Can also apply to people who emphasise what they actually do have, or lie about what they have e.g. the size of their home/their earnings/the make of their car.
If being extremely stereotypical, it would be accurate to say that twopence ha'penny millionaires are usually insecure and rely on this behaviour to get attention or gain some credibility.

Girl 1: Ooooh, look at my new Louis Vuitton handbag, it cost £124930843025843
Girl 2: Hang on I swear you bought that out the back of that van in Turkey?
Girl 3: Yeah she did, she's not fooling anyone, she's just a twopence ha'penny millionaire

Twopence ha'penny millionaire by samaralic December 11, 2013

nillionaire

Person without any money of their own.

He looks rich but it's all borrowed and his bank account is nil, he's a nillionaire.

Everything's in his wife's name, he's just a nillionaire.

nillionaire by Sirann January 2, 2009

Hillionaire

A person who is worth millions but claims to be dead broke.

You've got a great job, big house, nice cars, and country club membership but you always say you're too broke to buy a round? Dude, you a just another Hillionaire.

Hillionaire by "Tetsu Uma" - "The Iron Horse" June 30, 2014

Spillionaire 

Person who makes a lot of money (millions) due to the BP oil spill in the gulf.

Hey did you hear about Kevin Costner and his oil water separator invention? Yeah, he is gonna be a Spillionaire off that deal.

Spillionaire by JustAnotherTxDude June 19, 2010