I am a square peg in a round hole.
It doesn't matter what size your mallet is
I will not fit
All you do is damage me more.
Put down your mallets you stupid people.
Reshape the hole!
Did someone mention cleches? This one fits. It's kinda serious really but funny to, so I put it in humoUr.
I supect this brief thought has be expressed 1000 times over here.