ETYMOLOGY
for n.1., apparently a reduplication with vowel variation of trim (adj.);
for n. 2., apparently a whimsical application of n.1.
EXAMPLE
“…Esebon, Marybon, Wheston next Barnet;
A trym tram for an horse myll it were a nyse thyng;
Deyntes for dammoysels, chaffer far fet:
Bo ho doth bark wel, but Hough ho he rulyth the ring…”
From: Speke Parott
By John Skelton, 1523
Lexicophilia 