the core of a thing; the most essential or important part / passion; true commitment

Alternative form of doom and gloom

(idiomatic) Unique, one of a kind.

(idiomatic) Only love, sole sweetheart.

(derogatory) Two persons or organizations deemed indistinguishable in some way. / (derogatory) A pair of people who spend a lot of time together, and look and act similarly.

(aviation) Operating in hot climates and at high altitude.

(Cockney rhyming slang) Crap; rubbish, nonsense. / (Cockney rhyming slang) Excrement; the act of defecation. / Used other than figuratively or idiomatically: see pony, trap.

Alternative form of all dressed up and nowhere to go

Back and forth; from one place to another and back again.

(idiomatic) Elaborately attired or otherwise fully prepared for an anticipated situation or activity which, nevertheless, fails to occur.