galligaskins
plural noun
gal·li·gas·kins ˌga-li-ˈga-skənz 
1
a
: loose wide hose or breeches worn in the 16th and 17th centuries
b
: very loose trousers
2
dialectal, chiefly British : leggings
Word History
Etymology
earlier also garragascoynes, perhaps reshaping (after gascon) of Middle French garguesques, greguesques (also chausses à la gregesque "leggings in the gregesque style"), borrowed from Spanish gregüescos, plural of gregüesco, probably for *greguesco, from griego "Greek" (going back to Latin Graecus) + -esco -esque — more at greek entry 1
First Known Use
1577, in the meaning defined at sense 1a