Yiff

(Onomotopia.) A bark made by a fox when aroused. Usually referrs to the sound made by the male of the species.

The yiffs of the foxes in the field signaled a new fox family being born.

sin

The act one engages in when one is just finally beginning to have fun.

When finally the hard-working Mennonite had enough money to feed his family, he paused; knowing gluttony to be a sin.

checkmark

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."