'Phtt, as if someone with a pneumatic drill would actually use it, look at workmen, they just sit onit for a week. Stop wasting my time you assmonkey!! (see Assmonkey for definition)
Care must be taken when using this form of phtt, as the common reply is to spit on the person saying it.
Can also be used in conjunction with basying someone.
"Phtt phtt phtt phtt phtt phtt"