Scottish National Dictionary (1700–)
†FROG, n.2, v.
I. n. A flying shower of snow or sleet (Ags. 1808 Jam.).
II. v. To snow or sleet intermittently.
This word is frequently used to denote the distant appearance of flying showers, especially of snow, in the Grampian mountains, to those residing in the plain. Thus they say, It's froggin in the hills.
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"Frog n.2, v.". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 23 May 2018 <http://www.dsl.ac.uk/entry/snd/frog_n2_v>
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