floor(동사), preposterous, cursory

 to ​surprise or ​shock someone:She was ​completely floored when she ​heard that he was ​leaving the ​country.

• floor verb [T] (GO FAST)

to ​drive a ​car as ​fast as it will go:His ​buddy ​started the ​car and floored it.

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very ​silly or ​stupid:The very ​idea is preposterous!a preposterous ​suggestion
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quick and ​probably not ​detailed:a cursory ​glance/​looka cursory ​examination
done ​quickly with little ​attention to ​detail:He gave the ​picture a cursory ​glance.