senior moment 
noun informal
A temporary mental lapse (humorously attributed to the gradual loss of one’s mental faculties as one grows older): adults understand the idea of saving electricity, but are subject to occasional senior moments of forgetfulness...
- I can't differentiate between senior moments and other lapses.
- I tell you, I had a bit of a senior moment yesterday!
- ‘In a senior moment, the person cannot recall in a timely way the information that's there,’ says Cummings.
- hearken
- hear Mass
- hearsay
- hear say (or tell) of (or that)
- hearse
- Hearst, Patty
- Hearst, William Randolph
- heart
- heartache
- heart-aching
- heart and soul
- heart attack
- heart attack on a plate
- heart-balm
- heart-bearer
- heartbeat
- heart-bleeding
- heart block
- heart-blood
- heart-bond
- heartbound
- heart brass
- heartbreak
- heartbreaker
- heartbreaking