Scottish National Dictionary (1700–)

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JAMMER, n. A term employed in the game of marbles for an opponent's marble lying in the direct line to the hole and blocking access to it (Uls.4 1947). Edb. 1910 Scotsman (9 Sept.):
“Heavens! Thaut's a Jammer.” — You cannot hit it — in game of marbles.

[Jam, to baulk, obstruct, + n. suff. -er.]

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"Jammer n.". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 12 May 2021 <>



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