Wee-weed
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A mildly derisive euphemism related to pissed off but with a suggestion of childhood nervous incontenence or bedwetting. Suggests a loss of control from fear or anxiety as much as anger. Dont get wee-weed up over it is similar to dont wet your pants. Origin is the childhood term wee-wee, to urinate.
Wee-weed meaning & definition 1 of Wee-weed.