Scottish National Dictionary (1700–)
About this entry:
First published 1974 (SND Vol. IX).
THREEBLER, n. Gen. in pl. in exclamation threeblers, a call in marbles when three marbles were knocked out of the ring at one shot (Ayr., Kcb. 1930).[Altered deriv. form of Eng. treble, conflated with three. Cf. Threeple and Eng. dial. thribs, three at marbles.]
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"Threebler n.". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 30 Jun 2022 <http://www.dsl.ac.uk/entry/snd/threebler>