１０月３１日（金）はハロウィーン？忘れてました．思い出したところで，googleの辞書機能を使って，trick or treat（お菓子くれないといたずらしちゃうぞ！）を調べると，←「define:trick or treat」と入力．
>>Definitions of trick or treat on the Web:
a request by children on Halloween; they pass from door to door asking for goodies and threatening to play tricks on those who refuse
www.cogsci.princeton.edu/cgi-bin/webwn<<