NIGHT "OUT" what it mean???

THE word " NIGHT OUT " it self suggest wat it mean . TO not sleep whole night is wat b call " NIGHT OUT ". it tedious job but during engg. we do often. specially during internals n labs. though i do it from first sem!!!!!! some also do by playing cards ,watching movies or in dicussion. also for the breakfast when there is "PURI". NICE NA????