aw-shucks

[ aw-shuhks ]

/ ˈɔˈʃʌks /

characterized by a shy, embarrassed, often provincial manner.

Origin of aw-shucks

First recorded in 1930–35

avulsion, avulsion fracture, avuncular, avunculate, aw, aw-shucks, awa, awa', awacs, await, awaji

Ryan prefers the aw-shucks understatement of an earnestly furrowed brow.

Double the Pomade: The Aggressively Groomed Style Of Romney And Ryan |Robin Givhan |August 12, 2012 |DAILY BEAST
His refreshing angle is based in aw-shucks honesty and an earnest humor.

This Week’s Hot Reads: June 25, 2012 |Nicholas Mancusi |June 25, 2012 |DAILY BEAST
Perry discusses his upcoming execution with an aw-shucks smile; his hairline is tasseled with greasy bangs.

Werner Herzog’s 'Into the Abyss' Explores the Death Penalty |Ben Crair |November 20, 2011 |DAILY BEAST

aw-shucks

/ (ˌɔːˈʃʌks) /

seeming to be modest, self-deprecating, or shy don't be fooled by his aw-shucks attitude

C20: from the US interjection aw shucks, an expression of modesty or diffidence