"Irasshaimase!" is an honoriffic expression welcoming someone somewhere (usually into a place of business). It shows respect toward the performer of its action (the customer) by honoring them as opposed to humbling the speaker.
The plain form of the word itself is irassharu, and is an exalted form of several verbs including kuru (to come), iku (to go), and iru(for animate objects to exist).
A girl who has a nice big glutius maximus but lacks breasts. She usually lies about who she likes and uses people for rides and rides (if you know what i mean) Not only is this indivisual extreamly promiscuous, she loves the D. She would claim to be a lesbian but she just likes everybody
Dang, i thought she was a lesbian but naw she an Ivaysha.