It is the paper on which your birth date is written on. It USUALLY records your date of birth, but under other circumstances it could be used for just about ANYTHING. Most likely, your birth certificate is ACTUALLY an apology from the condom factory.
Wassup fool I was born in the 20's, look its on by BIRTH CERTIFICATE yo!
They told me to bring my BIRTH CERTIFICATE to prove I was 21 so they didn't let me into the gay strip club that I like to touch my weenis in.
The down on yourself feeling one gets after finding out that your most hated enemy, who you believe to be an illegal alien, proves to you that they are in fact a citizen of your respective country by flashing their birth certificate.
President Obama gave Donald Trump the birth certificate blues after releasing his long-form birth certificate to the world.
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.
British slang for a scientist or technical expert, esp . when the speaker is not certain of the expert’s specific field of study. Not necessarily derogatory, but typically used by persons without a technical background. In the US, the equivalent would be “egghead”, “squint”, or “geek.”
Origin of the word is unknown. Started sometime in World War 2. Given the typical evolution of British slang, could easily have started because what these experts did was confusing or “baffling” to the common person.