I got by by the squeak of my teeth

This is a congruent conflation of “by the skin of my teeth” and “squeaked by”, both meaning just barely.   My teeth seem to squeak when I rub my fingers over them, particularly after a good dental cleaning, so I can see where the speaker might be confused.  The phrase “squeaky clean” used to describe clean teeth (and other things) also comes to mind.  All in all, I think this malaphor is an improvement over the idioms noted above, don’t you?  A big squeaky clean thank you to Beverly Rollins Sheingorn VanDerhei (now there’s a mouthful!) for sending this one in!