Supguy 

Another way for saying what's up guy

Emedi matadi rachidi :hey supguy? Paul osiya :no much bruh

Supguy by anonymous April 16, 2023

Sumguy 

The name of a mythical super-collector, who always gets to flea markets/thrift stores/yard sales/boot sales/etc. and purchases all of the worthwhile merchandise you are personally seeking out. Also spelled as "Sum Guy."

Started in rec.games.video.classic, as the name of an individual always invoked by sellers who would tell inquiring collectors "yeah, we had a lot of <insert collectible here> until some guy came in and bought them all." That line, or variations, was so common, that it was determined that there was a single person wreaking all of this havok, and the sellers were actually stating his name- Sumguy.

Applicable to all frustrated collectors who shop in vain for their favored items.

I found a Vectrex overlay at this yard sale; I asked the guy running it if he had the Vectrex still, and he said that he had the system, a few dozen games, the 3D Imager, and light pen, but that Sumguy had just bought it all less than 5 minutes before I got there!

Sumguy by SG Fan November 1, 2004

surguy 

The act of admitting to very private or secret personal details without realising, often setting yourself up for life-long mocking

Phil: I licked a bumhole once because Graham up the chippy said it tasted alright.
Jeff: Oh no, phil's just pulled a surguy!

surguy by Bug999 May 14, 2016

SumGuy 

a literal skeleton sexy beast

Person 1: Is that SumGuy?

Person 2: I can't tell, who the fuck are you talking about?

SumGuy by SumGuyStan January 28, 2023