Don't Get your dauber down

- for one to get ones "dauber down" is when someone is depressed about something menial. The expression is normally said by a friend, parent, teacher, or coach as a slightly humorous way of telling the subject to cheer up.

Joe- Misses the field goal in practice for the second time in a row

Coach- Now c'mon now Joe, "don't get your dauber down"

Don't Get your dauber down by silachoo September 24, 2010

Don't shit where you eat

This expression refers to doing anything that would jeopardize something important or essential to you. A common example of shitting where one eats is engaging in a romantic affair with a co-worker, but lying to your roommate or stealing from friends also fits this expression.

Local Bike Shop Mechanic #1: "Can you believe that guy? I've hooked him up dozens of times, but after the tantrum he just threw, I'll never take a dime off a part for him again."

LBS Mechanic #2: "Seriously. Hasn't he ever heard? Don't shit where you eat."

Don't shit where you eat by Tom Cerveaux February 8, 2010

Don't 

Donald Trump.

Donald Trump
Donald T
Don T

Don't

Don't by Tedd July 30, 2016

don't sleep

Don't underestimate me (by worrying)

I'll call you as soon as I get there, don't sleep

don't sleep by blue November 30, 2003

Don Quixote 

Someone who is idealistic, and believes in justice, and is on a quest to save the world or someone, no matter how absurd the reality of accomplishing it is.

Eric was a Don Quixote when he thought he could save Gina from drugs. She's been hooked on crack for over a decade, and still hangs around dopeboys. He is out of his head on a lost cause.

Don Quixote by Eric Platt June 29, 2009

Don't mind if I do 

I phrase/saying to say while taking something that should have been, but wasn't, offered to you. Usually goes along with a deliberately rude gesture, like snatching something off a table.

At the Christmas Party, important guests were given a free tree ornament. Someone who was not supposed to get one walks up to their table and says abruptly "Don't mind if I do" and takes one of the ornaments for themselves.

Don't mind if I do by hungryjerk November 28, 2013

don't sweat it

don't mind
never mind

so, just "don't sweat it"!

don't sweat it by gotanswer? April 24, 2009