Pulling a Bernard: Disguising yourself and pretending to be a different person in order to date someone without them realising your true identity.
As seen in the 2010 Dreamworks movie, Megamind.
Chick one: That asshole! I thought it was my boyfriend sexing me up all night. Turned out it was his twin bro!
Chick two: Shit girl, he just pulled a Bernard!
Dude 1: So, I had my hoodie on, and this dudette suddenly glomps me, coz she thought I was her boyfriend. Nearly got away with it, too.
Dude 2: Ohoho! Shit, man! You were halfway to pulling a Bernard
Betty was startled awake by daughter Harriet for the 3rd time that night, and Betty, bleary-eyed, thought to herself "fucking hell Baby needs a Benadryl." But, knowing drugs are not the answer, Betty rocked her to sleep and put her back in bed.
A common term in the rural Midwest United States. The origin is for this term is blurry at best. Some people say that a gay couple in Kansas were attacked by Saint Bernard dog on May Day sometime in the 80s. After having received a blood transfer from the attack it contracted AIDS. This origin is disputed against the claims of it originating Iowa after a standoff between a meth head and the police. Taking place on May Day in the 70s, strong evidence suggests this is the origin. After a short fire fight, the meth head and the neighbor’s Saint Bernard were killed. Since the meth head was raging homosexual, it could be inferred that the term Gayer than a Saint Bernard on May Day came from that.
Person one: this job blows is so fuckinggay Person two: for real for real. It is Gayer than a Saint Bernard on May Day