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Idiom:
Rough around the edges ( not perfect )
Hit the book：
Queue-jumper
Overhead bin
Armrest hog
Immune to
Rationale
Speculate
Maddening
This year's study rankings are very similar to the 2014 results, with a few shifts.
The queue-jumper, who rushes to deplane, moved up from No. 10 in 2014 to No. 8 this year. The overhead bin user who grabs the first available space moved up one spot from No. 11 last year to break into 2015's top 10.
