This is when a small penis is overlaped by fat or stomach so nobody can see it.
David "fatass" Dixon has a dicklap because he is a fatass with a VERY small dick . Sucks for him he cant jack-off .
A dicklap is when all the fat from your fatass stomach overlaps your tiny dick so it can't be seen.
Fatass patrick Kippert probably has a dicklap with all that fat stretch on his belly, and we all know he has a small zub.
When a male species, is in the sitting position, with their dick/lap area only covered by the mere bottom of their shirt. If the shirt is removed, bystanders are exposed to the sight of awkward disordered underpants which reveal the top, pale hairy parts of the thighs and a possible outline of the male package in the underwear.
At a McDonalds drive-thru:
Cashier: "$5.42, please."
Male driver reaches for change under shirt, exposing dick lap.
Cashier, patiently watching from afar, sees dick lap and immediately feels uncomfortable.
Male driver to girlfriend passenger: "Shit, that guy just totally saw my dick lap."