“Is that a Nanotube in your pocket or do you have a hard-on?”
Eh…
dy/dr = r^2. Am I missing something here?
It is supposed to come out as ‘rdrr’, which could be pronounced ‘har de har har’ (ala Jackie Gleason).
It is a Simpsons joke from the *Bart the Genius * episode.
According to Freud, what comes between fear and sex?
Fünf.
…
…
Bwahhahahahahahahaha. That was terrific.
I still like the first one I saw:
SELECT * FROM users WHERE clue > 0
No rows returned
and a true incident at work that absolutely broke me up. I was filling out a form and said to everyone in general, “what’s the date today?”
Wihout looking up from his programming one guy said, “sysdate.”
Two jokes:
f(x) = 3x^2 walks into a bar. The barman says, “Sorry, we don’t cater for functions.”
f(x) = 6x waks into a bar. The barman says, “Sorry, we don’t cater for functions.”
Some people might object that these are the same joke. In fact they’re not, but the second one is derivative.
Two Heisenbergian particles walking down the road together, one turns to the other and whispers "Don’t look now, but I think we’re being watched"
Brilliant! 
However, [geeky nitpick]it works even better if the second one begins “f** ’ **(x) = 6x walks into a bar.”[/gn] 
C:/dos
C:/dos/run
Run/dos/run
Why do geeks celebrate Christmas on Halloween?
Because oct 31 = dec 25
See, 31 in octal, or base 8, is equal to 25 in base 10, or decimal
I had heard it (in HS prior to calculus) as
**(rd)[sup]2[/sup]r[sup]3[/sup] **
Apparently it wasn’t geeky enough…
I beg your pardon but it’s supposed to be:
C**:>dos
C:>dos*run
Run**dos***run
Drop the > and you’d be right.
My pitiful contribution:
How do you tell a boy chromosome from a girl chromosome?
Pull down its genes.
Does the ‘>’ only appear in Windows command line not original DOS? I don’t remember any more.
How many people can read hex, if only you and dead people can read hex?
57006
Two hydrogen atoms are talking:
Atom 1: I just don’t feel right since I lost my electron.
Atom 2: Lost your electron! Are you certain?
Atom 1: I’m positive.