Scottish National Dictionary (1700–)
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First published 1965 (SND Vol. VI).
This entry has not been updated since then but may contain minor corrections and revisions.
¶MOB-O'-CRACK, n.comb. The confused murmur of sound made by a large number of people in conversation (Lth. a.1838 Jam. MSS. X. 205).
[mob + o (= on (the)) + Crack, n.1]
