to become out of touch, to lose one's touch, to lose the habit of doing something / to lose the advantage of going first

(informal) to be confused, to be baffled, to be unsettled (by it, "it" being something previously mentioned)

(informal) to lose it, to lose the plot, to lose one's mind

(euphemistic) to lose one's life (to die)

to become flustered, to go to pieces

(informal) to lose it, to lose the plot, to lose one's mind

(of a woman) to lose the amniotic fluids just prior to delivery, to experience water breaking

(informal, figuratively) to lose one's bearings, to be all at sea

(figuratively) until one is out of breath, until one is gasping for breath

(figuratively) to lose face