A practical joke or prank is a practice intended to be humorous (usually in action, not just in words) in which another person is fooled, annoyed, or embarrassed in what the perpetrator imagines to be a mild and light-hearted fashion. Some types of practical jokes include:
hoaxes, especially ones perpetrated on or by the media (See also: culture jamming).
physical types of practical jokes, such as causing someone to:
forms of mild harassment (eg soaping someone's windows, smearing toothpaste or peanut butter in recessed handles like those found on most cars, decorating the yard with toilet paper, sprinkling popcorn on the yard).
Practical jokes are features of various kinds of holidays, such as April Fool's Day, Halloween, and in Spanish-speaking cultures, the Day of the Holy Innocents. They also feature in various rites of passage, such as stag nights.
The first half is a montage of their lives while they are freaking out, having fun with girls, travel and pranks, having just graduated from college without definite aims in sight.
The film has a college campus as the backdrop and a spirited bunch of girls and their pranks.
It covers everything from collegepranks and protests, to billboard valdalism, to famous figures in the culture jamming movement.