1640s, "small number of military men detailed for some purpose," from French esquade, from Middle French escadre, from Spanish escuadra or Italian squadra "battalion," literally "square," from Vulgar Latin *exquadra (see square). Until the introduction of automatic weapons, infantry troops tended to fight in a square formation to repel cavalry or superior forces. Sports sense is recorded from 1902.
To ejaculate semen; come: the filthy pigs spunking into women (1970s+)
[apparently fr Celtic spong, ''tinder, touchwood, punk,'' fr Latin spongia, ''sponge''; apparently semantically fr a resemblance between semen and a spongy excrescence found on trees, in which sense the word is found in British dialect]