Scottish National Dictionary (1700–)
TAM, n. A heap or small mound or hillock, gen. in comb. yirdi(e) tam, yerdy-, a farm compost heap of soil and weeds (Abd. 1972). See Yird.
Abd. 1906 J. Christie Drachlaw Revisited 5:
There's the dam Aboon which I spread a “Yirdie Tam.” Abd. 1949 Buchan Observer (8 Nov.):
A top-dressing of farmyard, or compost heap manure, known as “yirditam.”
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"Tam n.". Dictionary of the Scots Language. 2004. Scottish Language Dictionaries Ltd. Accessed 26 Feb 2020 <https://www.dsl.ac.uk/entry/snd/tam_n>
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