squeaker

squeak·er  (skwkr)

n.

1. One that squeaks.

2. Informal Something, such as an election, that is won, passed, or achieved by the narrowest of margins or at the very last moment.

Thesaurus

Noun	1.	squeaker - any artifact that makes a squeaking sound when used; "those sneakers are squeakers"; "which hinge is the squeaker?" artefact, artifact - a man-made object taken as a whole
	2.	squeaker - something achieved (or escaped) by a narrow margin close call, close shave, narrow escape, squeak accomplishment, achievement - the action of accomplishing something