SML, formerly SuperMarioLogan, is a YouTube channel focusing on puppet/plush skit videos. The channel is run by Logan Thirtyacre, and features Logan and Lance Thirtyacre, Lovell Stanton, Christopher Netherton and others providing vocal work. Originally, these videos consisted of Mario characters reinterpreted for the skit videos, alongside original characters such as Mr. Goodman, Chef Pee Pee (yes, really) and the infamous Jeffy character that fans say caused the downfall of SML.

Due to a cease and desist from Nintendo because of the crude, offensive nature of the show (which started a bit before Jeffy but peaked once Jeffy was introduced) Logan deleted his old channel containing the Mario characters and replaced them with "original" (read, making human characters that vaguely look like the Mario characters so he doesn't get sued selling merch of them) versions. For example, Mario became Marvin and Bowser Jr (known as Junior even before the cease and desist), a Koopa Troopa named Joseph and a Kamek named Cody all became humanized versions.

The show has been criticized for marketing its merchandise to children due to the offensive nature of the show, and especially the character Jeffy. This includes a physical SML store inside a mall in Logan's hometown of Pensacola, Florida (this is public knowledge, he has mentioned it in the past and even has/had a PO Box in Pensacola) which includes an interactive play area. The SML store is not open yet, however it's believed to be opening either late 2021 or sometime in 2022