Ejaculations or Ejaculatory (Short) Prayers

These are very short prayers - how short I guess may be subjective, but I think of them as only being a few words (some of the ones listed seem longer) - which can be prayed at any time, and it seems especially in times of emergency.

Within Roman Catholicism, some common ejaculations include the Jesus Prayer, the Fatima Prayer of the Holy Rosary, Come Holy Spirit, and Eternal Rest. (From Ejaculatory Prayer Wiki Entry)

This site (which I would double check but I think most are fine) says of them:

https://christhekingcatholichurch.wordpress.com/devotion/short-ejaculations-mini-prayers/

These short “mini-prayers,” also called “aspirations” or “invocations,” are to be said throughout the day to keep our minds focused on Heavenly things and to consecrate our efforts. It is good to adopt one of these as your own so that in times of stress, words that can focus your attention back to the holy come easily.

It lists as examples:

Most Sacred Heart of Jesus, have mercy on us.

Holy Mary, pray for us.

Blessed be God!

Additionally simply the name of Jesus (one word), reverently pronounced, has been identified as this kind of prayer.