have bats in the belfry [ have a bee in one's bonnet | have rocks in the head ]

to have a hidden agenda

Definition: Voluntary, repetitive, stereotyped, nonfunctional (and often rhythmic) movements that do not form part of any recognized psychiatric or neurological condition. When such movements occur as symptoms of some other disorder, only the overall disorder should be recorded. The movements that are of a non self-injurious variety include: body-rocking, head-rocking, hair-plucking, hair-twisting, finger-flicking mannerisms, and hand-flapping. Stereotyped self-injurious behaviour includes repetitive head-banging, face-slapping, eye-poking, and biting of hands, lips or other body parts. All the stereotyped movement disorders occur most f ...[+++]requently in association with mental retardation (when this is the case, both should be recorded). If eye-poking occurs in a child with visual impairment, both should be coded: eye-poking under this category and the visual condition under the appropriate somatic disorder code. | Stereotype/habit disorder

round-headed spider

Don't Get In Over Your Head

The end of the ram shall have an overall diameter not exceeding 50 mm and may have rounded edges.

(b) water fowl shall have access to a stream, pond, lake or a pool whenever the weather and hygienic conditions permit in order to respect their species-specific needs and animal welfare requirements; when weather conditions do not permit, they shall have access to water which enables them to dip their head therein so as to clean plumage;

I am saying this to the Luxembourg Presidency because we really must have these figures clearly in our minds in order to understand that this money will be used immediately, in the best of conditions.

Quail are capable of extremely rapid startle responses, which can lead to head injuries.