fillibeg

[xman]

My Apple Dictionary is pretty curt on the topic,

filibeg |ˌfɪlɪbɛg| (also philibeg, filabeg)
noun Scottish, chiefly historical
a kilt.
ORIGIN mid 18th cent.: from Scottish Gaelic feileadh-beag ‘little kilt,’ from feileadh ‘plaid’ and beag ‘little.’

but the more common term is well described.

kilt |kɪlt|
noun
a knee-length skirt of pleated tartan cloth, traditionally worn by men as part of Scottish Highland dress and now also worn by women and girls.
kilt
verb [ trans. ]
gather (a garment or material) in vertical pleats : [as adj. ] ( kilted) kilted skirts.
DERIVATIVES
kilted adjective
ORIGIN Middle English (as a verb in the sense [tuck up around the body] ): of Scandinavian origin; compare with Danish kilte (op) ‘tuck (up)’ and Old Norse kilting ‘a skirt.’ The noun dates from the mid 18th cent.

There's even a pic.



My Oxford Paperback is lacking the term filibeg.