A hollow casing surrounding any vessel and into which steam may be admitted.

plural of jackknife clam

common name for several species of saltwater shellfish in the family Solenidae; also known as razor shells. Their shells are long and narrow, suggesting a folded jackknife or cut-throat razor

(transitive) To create suspicion around (a person) through the spreading of rumors, manufacture of evidence and disinformation, etc.

(transitive) To create suspicion around (a person) in a way that makes them appear to be an informer.

An insulated padded jacket.

Synonym of knife switch

plural of jackaninny

(rare) A foolish or incompetent person.

Alternative form of straightjacket