subs. (general).An umbrella: first used at Winchester, and subsequently adopted at both Oxford and Cambridge Universities.
1885. Punch, June 6, 273. Pair o pattens and BROLLY are more in your line.
1900. KIPLING, Stalky & Co., 81. An Im catty all over, said MTurk, though I washed twice. An I nearly broke Beetles BROLLY plantin her where she would blossom!