have a screw loose

== English == === Pronunciation === === Verb === have a screw loose (third-person singular simple present has a screw loose, present participle having a screw loose, simple past and past participle had a screw loose) (slang) To be insane, irrational, or eccentric. ==== Related terms ==== screw loose ==== Translations ==== ==== See also ==== have one's head screwed on screwball screwy