does yam mean
'please help me, for i am being viciously dragged upwards at a frankly astonishing speed, by an eagle that has picked me up by my head and intends to eat me'?
(
Smash Monkey lowering the tone of the whole internet,
Fri 3 Sep 2010, 22:42,
archived)
Not quite
It means, "I am about to drop a large squash on your head; look sharpish."
(
the Angry Gumball Harmless American,
Sat 4 Sep 2010, 1:35,
archived)