All the definitions I have seen so far are written by drummers, or people who thinks the stereotype is false, but...
dude, drummers don't have real notes. Any dumbshit can tell difference between a quarter note and a whole note. A guitarist on everything known to man, that sees the iguanas in their eyeballs, can keep in time.
Drummers are necessary in bands, but so are microphones, and neither are musicians.
Guitarist: I can read my notes, but more than that, I have notes. You have the timing for your instrument, and nothing else. You don't play a tuned instrument, and no one even fucking knows your name. There's a reason that no one knows your name, and it's not because everyone's conspiring against you to keep drummers down.
Guitarist: Here, take one of these. It'll help.
*Guitarist hands drummer a pill.*
Drummer: What is it?
Guitarist: Does it matter?
Drummer: Oh yeah you try playing the drums
Dumbass: Ahh crap i can't do it. Well you're still dumb.
Drummer: Which is why you're failing more classes than me right?
B:That guy deserved the darwin award for stepping in our way, keep on driving
A:Dude we forgot the drummer!!!!
B:what the shizniz?!?!!? YOU IDIOT, TURN THE BUS AROUND NOW!!!!
Plays with the precise action that only a master craftsman can obtain. Thats right, with sticks. Only people with the right personality combination can become a drummer. That person blessed will also probably have to owm some sort of 'kit' to play with. And although guitarists are cool, there're one-hundred a penny. Sadly.
Singer: I'm not so cool I can read music but dont play and insturment, I am pretyer than the guitarist.
Bassist: No one knows my name but me and the drummer are best freinds and the band depends on us to keep them on the right line.
Drummer: Me and the bassist pay the bills, find the gigs, and are never given any credit for being in the band.