Scottish National Dictionary (1700–)
†MUMP, v.3 To move along a seat, etc. by a succession of jerks without getting up, to hitch (Rxb. 1825 Jam.). Hence phr. mump-the-cuddie, a children's game (see quot.).
Rxb. 1825 Jam.:
Mump-the-Cuddie. A play of children, in which they sit on their hunkers or hams, with a hand in each hough, and, retaining this position, hop or hitch forward; he who arrives first at the fixed goal gaining the prize.
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"Mump v.3". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 21 Aug 2018 <http://www.dsl.ac.uk/entry/snd/mump_v3>
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