During physics lecture/tutorial....
physics lecturer: so you finished the home work.
student: yes. partly
physics lecturer: let me see.
*student fiddling with the papers*
student: Miss, why don't you save the headache. it won't make any sense even if u see it.
Group studies
student1: why don't we start studying?
student2: what do you think we are doing for an hour?
student1: sizing up all the girls here!
student2: yeah that's what we call studying for life, bro!
real life sayings. names omitted because some people are stupid enough to get offended.