It means to fix their personality. or wrong doings. For example if they are rebels and are always drinking or doing drugs or something you would try to sober them up or "straighten them up"
She farted
Neaten: put things in order, clean up, tidy, or straighten up
The phrase "straighten up the house" means to pick up clutter, put objects in their proper places, and generally clean up everything. The phrase is related to the idea that anything in straight and orderly lines is neat and tidy.
After I got my clothes out of the dryer I straighten it up.
get your sh#t toether!
Tidy up means to straighten up. Remove clutter. Arrange things neatly, and put things away in their proper places. Often said as, "Tidy up your room."
to straighten your hair or curl its up to you
Resolve, clear up, straighten out.
An IED
Eh, not really...unless you straighten it every day...and I mean Really straighten it.
Because in order to jump they have to straighten out their bodies, and the only way to be able to straighten out is if the crouch up first.
What does a butt mean? It is on a person. Right? What does a butt mean? It is on a person. Right?