this happen to me last week........
I at my college as usual,attending my marketing class.......our class actually a lecture theater sitting like theater too, i with my friends always sit at the few last row on the top........then got a group presenting, 7 girls (friends also).......got 4 lecturers sitting see the presentation.......after the girls finish their presentation its the QnA session......they ask a question, "what the meaning of CBU??"........we don't have any clue coz we didn't listen to them.....then i like joking with my friends say CBU stands for "***** U" ........i thought no body hear it except my friends but who know the whole class hear it and everyone laughing n looking at me even the lectures was looking at me ........then i walk out the class with my friends like nothing happen ......but everyone still keep looking at me ......

The most worst thing........they still looking at me and laughing when i enter back the class like 45 minutes later....!!!!

LoL.....nice lec
Same as my friend but different abit la........my lec start teach us a new chapter thats damn hard......then my friend say "f*** this la"......then my lecturer replied....."sorry u cant f*** the slide"........then the whole class go LOL.....!!!!!