When in a sitting position, leaning forward slightly after farting to catch a whiff of your flatulence. Because after all, one's own farts actually smell pretty good, don't they? Must be done slightly and imperceptibly when around company, lest you give away the fact that you are both the "smeller" and the "feller".
"Oh man, who cut the cheese?"
"Must've been Bob. I saw him doing that stankster lean."
False bravado or courage a male demonstrates when posting under the safe anonymity provided by the internet. Usually displayed by pimply-faced 98-lb. losers whom girls never look at except when ordering fries with their Super Burgers. Occurs most frequently on discussion forums during heated arguments. The more threatening one becomes, the bigger their "internet wang" is said to be.
Poster 1: "You think you're so tough? Come up here to Podunk, Illinois and I'll kick your ass!"
Poster 2: "My, what a huge internet wang you have."