plural of surreal number

(mathematics) Any element of a field equivalent to the real numbers augmented with infinite and infinitesimal numbers (respectively larger and smaller (in absolute value) than any positive real number).

(medicine, infectious disease) A mask worn to catch bacteria shed in liquid droplets and aerosols from the wearer's mouth and nose. / A medical-grade mask worn during surgery.

(LGBT, surgery) Sex reassignment surgery performed on the reproductive organs, particularly the genitals.

Breast augmentation. / (bilateral) Mastectomy.

(informal, derogatory, humorous) A French person.

(idiomatic, sarcastic) What a surprise.

(probability theory) With probability equal to one.

To engage in crowd surfing (being carried over the heads of a densely-packed crowd)

Ellipsis of cheese-eating surrender monkey..