To "take the icing off the top" means to read between the lines.

To say one thing but really mean another, to allude to something else.
Damore:
"Yo Dylan, James is 'chillaxing' with Hannah at hers."

Dylan:
"Cool man, so why're you telling me?"

Damore:
"Come on man, take the icing off the top"

Dylan:
"OHHHHHHH, netflix and chillaxing?"

Damore:
"Si"
by Venerable Baron July 8, 2018
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