(mathematics) The mathematical study of probability (the likelihood of occurrence of random events in order to predict the behavior of defined systems).

(interrogative, vulgar, slang) An intensive form of what.

(vulgar) Used to express astonishment, shock, incredulity, or disbelief (as a shortened form of expressions such as "What the fuck is going on?", "...are you doing?", "…is this?" "…is it" or "...is that?").

(idiomatic) Of a person or their behaviour: outside the bounds of what is acceptable, or regarded as good judgment, morality, ethics, etc.

(idiomatic) A person who is innocent, naive, inexperienced, or helpless, especially with respect to an unfamiliar situation or environment.

(idiomatic) The ability to talk readily, glibly, and convincingly, especially on trivial matters and small talk.

(idiomatic) To accept a negative aspect of a situation in order to proceed. / (philosophy) To accept a counterintuitive implication of an argument or view.

Of, or relating to therapy. / Having a positive effect on the body or mind.

(medicine) A therapeutic agent

(idiomatic, Britain, euphemistic) Of an item of merchandise, to come into a person's possession without having been paid for; to have been acquired illegally.