What's the origin of "crapweasel"?

Green's Dictionary of Slang defines crapweasel 'an irritatingly stupid or deceitful person'.

According to Barry Popik's website, 'crapweasel' was coined in an episode of the television sitcom 'Friends' that aired on 3rd November, 1994. Ross used it to describe Paolo.

Barry Popik says that 'crapweasel' is a compound of 'crap' and 'weasel'. He further says that 'crapweasel' was applied to politics in the 2000s and has been frequently used by conservative blogger Michelle Malkin.

About 'weasel words', Popik says that it was popularised by Theodore Roosevelt in 1916. Here's an entry on 'weasel words' from the OED:

Weasel word n. orig. U.S. an equivocating or ambiguous word which takes away the force or meaning of the concept being expressed.

1900 S. Chaplin in Cent. Mag. June 306/2 ‘The public should be protected—’ ‘Duly protected,’ said Gamage, ‘That’s always a good *weasel word.’

[Barry Popik's website]