quack doctor

quack methods

quadratic

He quaffed off the wine

to quake in one’s boots

to quake with cold/fear

qualifying period

quality good

Quality matters more than quantity

quality time

Quality over quantity

Quality needs no advocate

qualms

to be in a quandary

He’s in a quandary

quantity

to quarrel with one’s bread-and-butter

to quarrel with somebody

A quarter of the playtime is already over.

a quarter to …

It's a quarter past five.

It's a quarter to five already.

quasi agreement

quasi-contractual relationship

quasi-autonomous non-governmental organisation