Of or relating to this region.

At one's school.

(UK) In a state of open hostility.

(US, slang) A prank in which a person's underpants are pulled up sharply from behind up over the head, or higher, in order to wedge the clothing uncomfortably between the person's buttocks.

not later than

(physics, atomic) The branch of physics that studies the internal structure of atomic nuclei.

(Ireland, informal, dated) The height of luxury, comfort, or modernity.

(physics, atomic) Synonym of atomic physics

(rhetorical question, somewhat hostile) Expresses discomfort because the interlocutor is looking at something; usually, this is said when the interlocutor has been staring at the speaker.

A sea fish, the Gadus morhua.