turn the screw

Buggins's turn

A humorous, disparaging term for the appointment of a person by rotation or promotion, on the basis of length of service (it being that person's "turn") rather than merit or level of qualification.

good turn

A good deed; a thoughtful or selfless act.

left turn

An unexpected change from the way things seemed to be going.

screw it

Expression of frustration or contempt.

screw off

To fail to do one's work; to goof off.

screw the pooch

to make a large mistake, to fail in dramatic and ignominious fashion.

screw this

A much less offensive version of fuck this.

screw you

less offensive version of fuck you.