Painted our town a wearing greenridinghued

• paint the town red: to go on a boisterous spree, to have a night out of fun and partying

• Red Riding Hood

• "The Wearing of the Green": Irish patriotic song

• When Ireland became independent in 1922, the new government retained the British postboxes; however, they painted them green, over the bright red that the British used. In this phrase, Joyce similarly replaces the word "red" with "green."