The natural and socially accepted norm for facial muscle contraction when one enters a room that smells like ass. The NBA player, Udonis Haslem, possesses a permanent ass face and thusly, has taken ownership of the phenomenon.
Dude, what's up with the Haslem Face? Can you please unflare your nostrils and take that curl outta yo' lip? It's not like it smells like ass in here.