Bail Mary is a term used in parkour and free running for when some one not only fails to pull off a move or trick, but fails in such a way that is both painful and comical.
Dude, i tried to do a frontflip to cat the other day but i misjudged it and face planted into the ground.
"BAIL OF HAY" used when someone has taken something too far and no-one laughs. This is in place of a tumbleweed, a bail of hay is bigger therefore the joke is shitter. A quick wave of the arm across the body can also symbolise this term.
"yeah and then you take a shit on her chest!!"
(silence)
"BAIL OF HAY!!"
A pick up line that freaks out the person your hitting on. Usually intentionally creepy so you can get someone to stop bugging you/liking you/loving you. Impressive results.
'Hey Margaret?'
'Yes Todd?'
'Anal in the backseat tonight?'
'What? O_O'
(Margaret proceeds to run the fuck away while Todd stands there like an idiot)
(People across the street chuckle)
'Way to pull a bail runner'