Simp is derogatory Internet slang for a man seen as displaying excessive sympathy or attention toward a woman online.
Simp or SIMP may also refer to:
- Solid Isotropic Material with Penalisation, a method of topology optimization
- Solitary Islands Marine Park, New South Wales
- Sri Indera Mahkota Pahang, an honor given by the Sultan of Pahang, Malaysia
- Strongly interacting massive particle, a hypothetical elementary particle
- Simp., a non-standard abbreviation for 'simplified', as in "Simplified Chinese"
- Squirrels in My Pants, a song featured in 2007 animated series Phineas and Ferb