1) A person who has ethnic origins from the sub-continent of India (including Pakistan). The term comes from the perception that many convenience stores selling slurpie treats are owned or operated by people originally from India or Pakistan.
2) A term sometimes (humorously) used to differentiate India-origin "Indians" from Native Americans who are also referred to as "Indians".
3) Considered humorous, and/or mildly offensive.
Comment: "My friend Aron is an Indian.
Reply: "OH? Is he a Slurpie Indian or a Casino Indian?"