semilegal 

1. something that is neither legal, nor explicitly illegal.
2. something that is illegal, but you cant get caught for.

1. Watching bootleg movies off of a streaming sight is semilegal, technically you are violating the copyright laws, but you cant get caught, so who cares!

semilegal by christn3 December 9, 2008

smilegasm 

The feeling you get when someone does/says something sweet for you.

'Yeah, Becky! He gave me these flowers and I had a total smilegasm!!!'

smilegasm by Kaitlyn Iz Kewl August 14, 2005

semilegend 

When you have a micropenis but you're still an optimist who tries to look on the brighter side of every situation.

Person A: Yo why does he think he's gonna succeed in the rap industry with these trash songs?
Person B: He's semilegend

semilegend by tandyhands April 26, 2021

Semiregular Convex 

A similar arrangement of nonintersecting regular planar convex polygons of two or more different types about each polyhedron vertex

A semiregular convex is a 3D shape.

Semiregular Convex by Raven Definies January 29, 2023