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8.
The week leading up the opening night of a theatrical performance.
Signs of hell week:
-Begging your teachers not to assign big tests/assignments during said week
-Not studying or preparing at all for the tests/assignments that get assigned anyways
-Not talking to people in the cast/crew during school because you know you're going to see them for hours after school anyways
-Stealthily dancing behind the curtains....come on, you know you do it!
-By Wednesday, it is nessecary to bring air freshener into the dressing room and the person who does is a hero
-Losing part your custume at some point during the week
-Some one will cry
-If you're not a theatre kid, then it's easy to tell the people who are because they're falling asleep in class
-Wearing your production T shirt all week
-If you're smart enough to stock up on food before rehearsal...you better hide it!
-You're used to the squeaks and other horrible noises that the microphones make during the first few days
-By the end of the last performance, everyone is family and most cry
Lead: This...*snif*...was...*snif*...the most amazing...*snif*...thing ever! *sob*
Extra: *hugs* *cries too*
Supporting role: Hell week is so worth it!
by defygravity137 April 19, 2011
 
9.
A week when in-laws stay at your home, causing severe migraines, intense frustration, and extreme muscle tension....mainly in the rectum and sphincter. This week includes awkward moments brought on by unusual conversations about your spouse, high likelihood of cold showers, the inability to sleep-in even though those around get to sleep however long they want, not enough food in the house even when you went to the grocery store only ten minutes ago, spending excess money, having to put the kids back to sleep because the conversations are too loud, crying babies, and no privacy. Sometimes one Hell Week is followed by one or more Hell Weeks and turns into a Hell Month. Hell Month, on rare occasions turn into Hell Lifetimes when one of the in-laws move into the home.
Next week is "hell week" for me because I have some in-laws staying with us.
by chocol8sauce May 10, 2014
 
10.
Contrary to popular belief, Hell Week is not the week of boot camps where you'd rather be in hell than there. Hell Week is the last week of school where the only thing you're doing is taking finals. It's boring, dumb, and after you're finished, you look like Ke$ha after a week of hard partying. Trust me, it's not pretty.
Guy 1 - Dude, you look horrible!
Guy 2 - Hey, fuck you man! I just got outta Hell Week!
Guy 1 - ......many apologizes, my friend, many apologizes.
by I_kicked_ur_mom July 25, 2010
 
11.
A week at the Illinois Mathematics and Science Academy (IMSA) that involves much studying, loads of homework, and numerous papers, all due on the same day. Usually occurs before an extended or finals week. Some have reported that hell week occurs some time in February also.
You can tell that it is Hell Week when everyone has bloodshot eyes and the after effects of a caffiene high.
by some_random_dude_LOL December 12, 2005