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The expression of kicking something really hard. Used most appropriately in soccer or a defenseless creature. It was a cartoon character too; he had really nice boots.
I had to give my teacher a thunderboot right in the nuts in order for him to feel my fustration at his futile attempts at teaching. Fortunately for him, he was named NumbNuts for a reason.
by jubilant-student November 03, 2003
A shoe that is made specifically for those of excessive weight. When the person walks, it is said that the ground shakes, and the cause of this is the "thunder in his boots."
"When she put on the thunderboots, if looked as if she was baking bread rather than trying to apply footwear."
by Jerry August 20, 2004