What is the meaning of Hiccup?

A spasm of the diaphragm, or the resulting sound.

A case of the hiccups; the condition of having the spasms of hiccupping; singultus; diaphragmatic myoclonus.

Any spasm or sudden change.

A minor setback.

To produce a hiccup; have the hiccups.

To say with a hiccup.

To produce an abortive sound like a hiccup.

Source: wiktionary.org