Machete in the groin is a term that is used to describe the worst thing that can possibly happen to anyone, ever. The term is often used when a person receives a machete in the groin or when he witnesses somebody else receiving a machete in the groin. Examples of popular usage include "Deary me, golly gosh, I do indeed seem to have received a machete in the groin, what rare deed doth this be?," or "Jesus Christ! That guy just got a fucking machete in the groin!"