The Broad Scots Dictionary

Mae - "more"
Maggots' meat - "food for worms"
Mahoun - "Satan"
Mailen - "a farm"
Mair - "more"
Maist - "most, almost"
Maistly - "mostly"
Mak - "to make"
Makin' - "making"
Mallie - "Molly"
Mang - "among"
Manse - "the parsonage house, where the minister lives"
Mark - "marks (this and several other nouns, which in English, require an s to form the plural, are in Scotch, like the words sheep, deer, the same in both numbers)"
Marled - "variegated, spotted"
Mar's year - "the year 1715"
Martial chuck - "the soldier's camp companion"
Mashlum - "meslin, mixed corn"
Mask - "to mash, as malt"
Maskin'-pat - "a teapot"
Maud, maad - "a plaid worn by shepherds, etc."
Maukin - "a hare"
Maun - "must"
Maut - "malt"
Mavis - "the thrush"
Maw - "mow"
Mawin' - "mowing"
Mawn - "a small basket"
Meere - "a mare"
Meikle or meickle - "much"
Melancholious - "mournful"
Melder - "corn or grain of any kind, sent to the mill to be ground"
Mell - "a mallet for pounding barely in a stone trough"
Melvie - "to soil with meal"
Men' - "mend"
Menseless - "ill-bred, rude, impudent"
Messin - "a small dog"
Midden - "a dunghill"
Midden-creels - "baskets for manure"
Midden-hole - "a gutter at the bottom of a dunghill"
Mim - "prim, affectedly meek"
Min' - "mind, resemblance"
Minawae - "minuet"
Mind't - "mind it; resolved, intending"
Minnie - "mother, dam"
Mirk - "mirkest, dark, darkest"
Misca' - "to abuse, to call names"
Misca'd - "abused"
Mischanter - "mishap"
Mislear'd - "mischievous, unmannerly"
Misteuk - "mistook"
Mither - "a mother"
Mixtie-Maxtie - "confusedly mixed"
Moistify - "to moisten"
Mons-meg - "a large piece of ordnance"
Mony or monie - "many"
Mools - "dust, earth, the earth of the grave." To rake the mools "to lay in the dust"
Moorlan' - "of or belonging to moors"
Morn - "the next day, to-morrow"
Mou - "the mouth"
Moudiwort or modewurk - "a mole"
Mousie - "diminutive of a mouse"
Muses'-stank - "muses' rill"
Mutchkin - "an English pint"
Mysel - "myself"