The phrase my husband so aptly applied when I asked him why I sometimes get so...weary...even on ordinary days without any precipitating event or unusual trauma or drama. (Though I don't know if there are any days without drama around here, really.)
See also: Siege Warfare.
I have a feeling the weather may contribute to this. And oh yeah, maybe being third tri makes a difference. (When I have to get up from playing on the floor, I've yelled "winch!" so often that the (almost) 2-yr. old has added it to his vocabulary.)
P.S. I just checked these terms at dictionary.com and thought that readers might find the following to be applicably amusing, or amusingly applicable:
"the act or process of surrounding and attacking a fortified place in such a way as to isolate it from help and supplies, for the purpose of lessening the resistance of the defenders and thereby making capture possible."
"any prolonged or persistent effort to overcome resistance."
"a series of illnesses, troubles, or annoyances besetting a person or group"
"a prolonged period of trouble or annoyance."
"a reduction or decrease in numbers, size, or strength"
"a wearing down or weakening of resistance, esp. as a result of continuous pressure or harassment"
"the act of rubbing against something; friction."
"a wearing down or away by friction; abrasion."
And last but certainly not least, "Theology. imperfect contrition"