• to clobber out, to clobber up, to deck oneself out, to ponce oneself up
• dressed out all her finery
• to deck up, to rig, to rig out, to rig up
• to bedeck oneself, to cut a dash, to fix up, to get oneself up, to get up to kill, to get up to the nines, to ponce oneself up, to put on one's best bib and tucker
• you're looking very fine today!