Reply To: Dressing up as a Nun, Munk,or Santa Claus for Purim

See the Igros Moshe YD:1:81 who brings the Rama who brings the Ran to asser goyish clothing for two reasons (see tshuvah). Whatever the case may be even if it is done in jest(maybe a heter,hard to hear)it doesn’t seem like the appropriate thing to do on purim