Literally, German for "shit." Commonly used in everyday language meaning "Holy Crap I can't believ that happened!"
After the girl tripped and hit her head on the desk and fell unconcious, the boy exclaimed "Sheisa!"
by wiggy April 17, 2003
a german porno where the man shits on the girl and then the girl shits on the guys chest
i had a sheisa with that hot girl it was awsome
by dan re man June 29, 2003