correct grammar...help! quick!

[Wedgie]

Just did a quick google and fohnd the worst and nerdiesr joke of all time.
A SQL query walks into a bar. In one corner of the bar are two tables. The query walks up to the tables and asks "Mind if I join you?"

[HH3]

I just got someone here to explain that to me...not bad

[Wedgie]

I lie, its not the worst or nerdiest.
I found a "joke" written in code and you can even get a T-shirt with it on the front. It seems there really are Sheldon Coopers out there!

[Pseudo]

Oh boy, it's NERD JOKE time!

What do you get when you cross a mosquito with a mountain climber?

Nothing. You can't cross a vector with a scalar.

[Pseudo]

[am Bays]

Let's eat Grandma,
Let's eat, Grandma

Commas, saving lives since....

[tipper]

correct grammar, the difference between:
knowing your shit, and:
knowing you're shit