last time i participated in a training, the teacher came from Wales,
after a long flight (maybe 15 hours?)
To express his uncomfortable feeling of the long flight & also
bad feeling resulted from time differences, he said
"I could not fall asleep in the hotel due to jet ***".
I did not catch the word ***, do you know which word this *** could be?
jet lag = fatigue and sleep disturbance resulting from disruption of the body's normal circadian rhythm as a result of jet travel through changing time zones.