What is Checkmark?
1.
Used as a verb: To make sure something was done right.
"Get over there and checkmark Jake's work, okay? He's new and still messes up like
gangbusters ."
2.
A eupemism for dick (in terms of "giving" or "getting dick")
Can be used as verb or noun.
"Did you checkmark Erica last night?"
"I want a checkmark from that dude over there."
See