Yellowcard 

1) Doing something mildly wrong or inappropriate.
2)not telling the truth, misleading others.

I saw that you hit Karl in the back without him knowing. That's a yellowcard Brian!

Yellowcard by Grzech September 5, 2018

Yellowcard.io 

The world's first cryptocurrency gift card that allows you exchange local currency for crypto and crypto (like bitcoin, Metal, Ethereum etc.) for local currency in physical stores & online.
Also an instant cryptocurrency exchange that delivers in minutes.

Oh I just sell my bitcoins on Yellowcard.io for quick cash.

Yellowcard.io by Emmytimm February 1, 2020

yellowcake 

Concentrated Uranium ore. Can be reprocessed into uranium gas, which is a feedstock for uranium enrichment. Enriched uranium can be used in nuclear weapons; at low levels can be used as fuel for nuclear energy plants.

Guard at the Isfahan Nuclear Conversion Facility in Iran: Look at all that yellowcake in the back of that truck, i hope it isnt used to enrich uranium.

yellowcake by Gratenkutzombie August 27, 2005

yellow card 

Expression meaning that a girls nipples are visible through her shirt. Deriving from the automatic yellow card given to soccer players if they slide tackle with their studs ( cleats ) showing.

Me : Dude it's cold.
You : Wow look at that girls nips.
Me : Yellow card ! Studs showing.

yellow card by Paddy McMurphy October 22, 2007

yellow card 

Something you get in soccer if you do something the ref doesnt like. Yellow Card is not a band. yellowcard is a band. Please get this straight. If you are searching for the band in google, do not type in yellow card because it will bring up soccer sites.

Our team racked up the yellow cards this season.

yellow card by Kris February 17, 2004

yellow card 

n, used to decribe a girl or woman who is, to be honest, a prostitute. Old Russian expression, I picked it up in Crime and Punishment - apparently 'back in the day' in Russia legal prostitutes carried a special yellow passport

that bitch is carryin a yellow card fo' sho'

yellow card by Jo_87 May 30, 2006

yellowcaked 

to be yellow caked is to be deceived into taking violent action based entirely on false and misleading information. Yellow Cake uranium and weapons of mass destruction never existed in Iraq besides those which were provided by the U.S. and Dick Cheney to be used against Iran during his early political carrier.

persuaded by deception.

We were yellowcaked into going to war in Iraq.

yellowcaked by The Ell June 4, 2009