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2.
No matter how nice someone acts or good someone dresses, it doesn't change the fact that the person is at that time seen as an asshole.
Scene from Californication: protagonist suits up for a trial when daughter walks in.
Protagonist: 'How do I look?'
Daughter: 'You know what they say...can't polish a turd.'
by AnaleTaart August 12, 2011
 
1.
Despite your best efforts, there are some things you just can't fix/improve.

To point out futile attempts to conceal/change the baisc nature of something.
1) Joe: Danny's back in town. He lost a bunch of weight, got a nose job, got hair plugs and now wears really flashy clothes but he's still one ugly motherfucker.

Jim: Well, you can't polish a turd.

2) The comb-over hairstyle
by henryj May 02, 2006