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1.
"don't pull as sammons" is a common saying nowadays. It's like saying don't be a dumbass, except in a nice way. Usually when someone does something n00bish and no words can express the stupidity you have just witnessed, simply say "don't pull a sammons"
A serious example is when someone puts a marshmallow in to the microwave and heats it for two minutes and sits there watching amazed yelling "Dude, the mellow got pwned!"

When you drop by seeing your microwave dripping with ooze on the sides like the gremlins in the movie "gremlins", then here is the best time to say "don't pull a sammons"
by Tran the man May 12, 2006
 
2.
Is a term used for describing a Northern Irish cunt. Often used in reference to those who have stupid accents and believe because they use sterling that they are superiour.
James your such a Sammon
by good vibrationz December 01, 2008