Etymology: probably alteration (influenced by obsolete English tirve to tirl, from Middle English tirven) of Old English tearflian to turn, roll; akin to Old High German zerben to turn over, Old English torfian to throw, be tossed, Old Norse tyrfa to cover with turf, torf turf — more at turf
II. verb
(-ed/-ing/-s)
1. chiefly Scotland : to make a rattling sound with a door latch or pin
2. chiefly Scotland : to whirl especially in moving or falling
2. chiefly Scotland : to rattle (as a pin) by moving rapidly up and down
III. noun
(-s)
1. chiefly Scotland : a bout or turn usually at drinking or dancing
2. chiefly Scotland : something that revolves (as a turnstile or wheel)
Useful english dictionary. 2012.