"This is a fine form to make a prepositional proposition in. 
 The proposition is this: prepositions are fine to end a sentence with." 
 "'Well, man, you know what they say.' 
 No, I don't. I don't know what they say. 
 I don't even know who they are. 
 Who is this THEY? 
 They seem pretty smug. 
 They seem to think they know shit. 
 F*ck them."