Cheek by Jowl
.In intimate confabulation; tête-à-tête. Cheek is the Anglo-Saxon ceca, céac-bán, cheek-bone; and jowl is the Anglo-Saxon ceole (the jaw); Irish, gial.
“Iʹll go with thee, cheek by jowl.”—Shakespeare: Midsummer Night’s Dream, iii. 2.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.