(slang) it is wise to wear a condom before sexual intercourse.

Used to tell somebody to reveal a secret.

(vulgar) An expression of anger or disrespect toward another party's statement.

Many problems are happening simultaneously or in close succession.

(idiomatic) Irrevocably committed to something. / (idiomatic) In trouble.

One can never be sure of one's paternity.

(idiomatic) To exaggerate or overstate a feeling or emotion. / (idiomatic) To flatter. / (idiomatic) To guilt, guilt-trip.

(idiomatic) Barely visible because gone too quickly.

The best available under the circumstances.

(Internet slang, humorous) Used to request a picture of a reported event, especially on an Internet forum. / (Internet slang, humorous) Used to demand verifiable evidence for a statement.