(before 2020)
S.I.M.P. stands for "Squirrels In My Pants," a song from the show Phineas and Ferb in 2008.
In the episode "Comet Kermillian," the song was improvised when Candace was struggling to get two squirrels out of her pants. Immediately before, Suzy Johnson had used a croquet mallet to shoot an acorn into her pants and the squirrels followed the acorn.
S.I.M.P. stands for "Squirrels In My Pants," a song from the show Phineas and Ferb in 2008.
In the episode "Comet Kermillian," the song was improvised when Candace was struggling to get two squirrels out of her pants. Immediately before, Suzy Johnson had used a croquet mallet to shoot an acorn into her pants and the squirrels followed the acorn.
So they wrote a song about entering a girl's pants trying to get a nut. And called the song SIMP. They are time travelers and no one can convince me otherwise.
by maple17 August 17, 2020
Get the Simpmug. A Tier 3 Sub To Any Twitch Thot
by MX5 Míata September 1, 2020
Get the Simpmug. by willy boi January 23, 2020
Get the simpmug. A person who loves a particular person and would do anything to get their appreciation, affection and attention. Ie; Buying a house, a car, jewelry, or giving her a money without actually dating the person.
by Lox10946 December 3, 2020
Get the SIMPmug. 
Get the simpmug. by ScrewOffUrbanDictionary January 11, 2021
Get the Simpmug.